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大阪大学大学院基礎工学研究科 附属スピントロニクス学術連携研究教育センター

  

研究成果ACHIEVEMENTS

国際学会

-2023年-

K. Kawashima, T. Okada, M. Yamada, T. Naito, Y. Wagatsuma, K. Sawano, and K. Hamaya:
"Valley splitting energy in strained Si0.1Ge0.9/Ge-on-Si detected by lateral spin transport measurements"
MRM2023/IUMRS-ICA2023, Kyoto, Japan, December 11-16, 2023.

S. Kusumoto, M. Yamada, A. Yamada, K. Sawano, and K. Hamaya:
"Enhancement of spin signals in CoFe/Sn-doped Ge/Co2FeSi vertical spin-valve devices"
MRM2023/IUMRS-ICA2023, Kyoto, Japan, December 11-16, 2023.

T. Usami, Y. Sanada, S. Yamada, Y. Shiratsuchi, R. Nakatani, and K. Hamaya:
"An epitaxial multiferroic heterostructure composed of Co2FeSi/V/Pb(Mg1/3Nb2/3)O3-PbTiO3(011)"
MRM2023/IUMRS-ICA2023, Kyoto, Japan, December 11-16, 2023.

M. Yamada, T. Naito, R. Nishimura, A. Masago, Y. Shiratsuchi, Y. Wagatsuma, K. Sawano, R. Nakatani, T. Oguchi, and K. Hamaya:
"Effect of interfacial magnetism on spin injection/detection efficiency in Gebased spin devices with Co2FeAl0.5Si0.5/Ge Schottky tunnel junctions"
MRM2023/IUMRS-ICA2023, Kyoto, Japan, December 11-16, 2023.

T. Onabe, Z. Wu, T. Tohei, Y. Hayashi, K. Sumitani, Y. Imai, S. Kimura, T. Naito, K. Hamaya, and A. Sakai:
"Local strain distribution analysis in strained SiGe spintronics devices"
2023 International Conference on Solid State Devices and Materials (SSDM2023), Nagoya, Japan, September 5-8, 2023.

Atsuya Yamada, Michihiro Yamada, Shuhei Kusumoto, Youya Wagatsuma, Shinya Yamada, Kentarou Sawano, and Kohei Hamaya:
"Detection of magnetoresistance effect in all-epitaxial Co2MnSi/Ge/Co2MnSi vertical spin-valve devices on Si(111)"
The joint International SiGe Technology and Device Meeting-International Conference on Silicon Epitaxy and Heterostructures conference 2023 (ISTDM-ICSI-2023), Como, Italy, May 22-25, 2023.

Michihiro Yamada, Kazuaki Sumi, Ai. I. Osaka, Azusa. N. Hattori, Youya Wagatsuma, Kentarou Sawano, Shinya Yamada, Shota Suzuki, Marwan Dhamrin, and Kohei Hamaya:
"Molecular beam epitaxy growth of ferromagnetic Heusler alloy films on SiGe(111) grown by Al-Ge-paste-induced liquid phase epitaxy"
The joint International SiGe Technology and Device Meeting-International Conference on Silicon Epitaxy and Heterostructures conference 2023 (ISTDM-ICSI-2023), Como, Italy, May 22-25, 2023.

Takahiro Naito, Michihiro Yamada, Youya Wagatsuma, Kentarou Sawano, and Kohei Hamaya:
"Enhancement in Spin Transport Length in Strained n-Si0.1Ge0.9(111)"
The joint International SiGe Technology and Device Meeting-International Conference on Silicon Epitaxy and Heterostructures conference 2023 (ISTDM-ICSI-2023), Como, Italy, May 22-25, 2023.

K. Kawashima, T. Naito, M. Yamada, T. Okada, Y. Wagatsuma, K. Sawano, and K. Hamaya:
"Significant effect of carrier concentration on spin lifetime at low temperatures in strained Si0.1Ge0.9"
INTERMAG 2023, Sendai, Japan, May 15-19, 2023.

Shinya Yamada, Takamasa Usami, Sachio Komori, Sekai Nagata, Yukio Nozaki, Tomoyasu Taniyama, and Kohei Hamaya:
"Epitaxial Co2FeSi/LiNbO3 multiferroic heterostructures with a low damping constant"
INTERMAG 2023, Sendai, Japan, May 15-19, 2023.

Shuhei Kusumoto, Michihiro Yamada, Atsuya Yamada, Youya Wagatsuma, Kentarou Sawano, and Kohei Hamaya:
"Structural and magnetic properties of CoFe/Sn-doped Ge/Co2FeSi for vertical spin-valve devices on Si"
INTERMAG 2023, Sendai, Japan, May 15-19, 2023.

Yuichi Murakami, Takamasa Usami, Yu Shiratsuchi, Yuya Sanada, Shinya Yamada, Ryoichi Nakatani, and Kohei Hamaya:
"Growth and magnetoelectric effect of epitaxial Co3Mn films on piezoelectric Pb(Mg1/3Nb2/3)O3-PbTiO3(001)"
INTERMAG 2023, Sendai, Japan, May 15-19, 2023.

　
-2022年-

Takamasa Usami, Shumpei Fujii, Yu Shiratsuchi, Amran Mahfudh Yatmeidhy, Shinya Yamada, Takeshi Kanashima, Ryoichi Nakatani, Yoshihiro Gohda, Kohei Hamaya：
"Giant Converse Magnetoelectric Effect in Co2-Heusler Alloy/Pb(Mg1/3Nb2/3)O3-PbTiO3 Multiferroic Heterostructures"
2022 MRS Fall Meeting & Exhibit, Boston, Massachusetts, USA, December 6-8, 2022.

Naito Takahiro, Yamada Michihiro, Wagatsuma Youya, Sawano Kentarou, Hamaya Kohei:
"Long-distance spin transport in strained SiGe"
67th Annual Conference on Magnetism and Magnetic Materials (MMM 2022), Minneapolis, Minnesota, USA, October 31-November 4, 2022.

Yamada Michihiro, Sumi Kazuaki, Naito Takahiro, Sawano Kentarou, Hamaya Kohei:
"Room temperature spin signals improved by low-temperature annealing in Co2MnSi/Fe/Ge lateral spin-valve devices"
67th Annual Conference on Magnetism and Magnetic Materials (MMM 2022), Minneapolis, Minnesota, USA, October 31-November 4, 2022.

R. Nishimura, M. Yamada, Y. Shiratsuchi, R. Nakatani, and K. Hamaya:
"Perpendicularly magnetized [Co/Pd]n/Co2FeAl0.5Si0.5/Fe multilayers on Ge for semiconductor spintronic applications"
22nd International Vacuum Congress (IVC-22), Sapporo, Japan, September 11-16, 2022.

S. Yamada and K. Hamaya:
"Epitaxial all-Heusler pseudo-spin-valve strucures grown by low-temperature molecular beam epitaxy"
24th International Colloquium on Magnetic Films and Surfaces (ICMFS-2022), Okinawa, Japan, July 10-15, 2022.

T. Usami, S. Fujii, A. M. Yatmeidhy, Y. Gohda, J. Okabayashi, S. Yamada, T. Kanashima, Y. Shiratsuchi, R. Nakatani, and K. Hamaya:
"Electric-field modulation of magnetic anisotropy in Co-based Heusler alloy films on PMN-PT(011)"
24th International Colloquium on Magnetic Films and Surfaces (ICMFS-2022), Okinawa, Japan, July 10-15, 2022.

Y. Sanada, T. Usami, S. Yamada, T. Kanashima, Y. Shiratsuchi, R. Nakatani, and K. Hamaya:
"Converse magnetoelectric effect in prependicularly magnetized [Co/Pd]5/Pb(Mg1/3Nb2/3)O3-PbTiO3 heterostructures"
24th International Colloquium on Magnetic Films and Surfaces (ICMFS-2022), Okinawa, Japan, July 10-15, 2022.

M. Yamada, K. Sumi, T. Naito, K. Sawano, and K. Hamaya:
"Two-terminal magnetoresistance ratio in Co-based Heusler alloy/germanium lateral spin-valve devices"
15th Joint MMM-INTERMAG Conference (2022 Joint), New Orleans, USA, January 10-14, 2022.

Takamasa Usami, Shumpei Fujii, Shinya Yamada, Yu Shiratsuchi, Ryoichi Nakatani, Kohei Hamaya:
"Co2MnSi/Pb(Mg1/3Nb2/3)O3-PbTiO3 interfacial multiferroic heterostructures"
15th Joint MMM-INTERMAG Conference (2022 Joint), New Orleans, USA, January 10-14, 2022.


-2021年-

Shinya Yamada, Yuki Teramoto, Tomoyasu Taniyama, Kohei Hamaya:
"Electric-field modulation of magnetotransport properties in an epitaxial Co2FeSi/BaTiO3 interfacial multiferroic heterostructure"
Materials Research Meeting (MRM) 2021, Yokohama, Japan, December 13-17, 2021.

S. Fujii, T. Usami, S. Yamada, Y. Shiratsuchi, R. Nakatani, and K. Hamaya:
"Electric-field modulation of magnetic anisotropy in epitaxial Co2FeSi/Pb(Mg1/3Nb2/3)O3-PbTiO3 multiferroic heterostructures"
Materials Research Meeting (MRM) 2021, Yokohama, Japan, December 13-17, 2021.

Y. Wagatsuma, Md. M. Alam, K. Okada, R. Kanesawa, M. Yamada, K. Hamaya and K. Sawano:
"Observation of photoluminescence from SiGe/Ge MQW on Ge-on-Si(111)"
International Symposium on Novel maTerials and quantum Technologies (ISNTT) 2021, online, December 14-17, 2021.

Yuwa Sugiura, Masashi Sasaki, Youya Wagatsuma, Koudai Yamada, Yusuke Hoshi, Michihiro Yamada, Kohei Hamaya, Kentarou Sawano:
"Strong room-temperature EL emission from Ge-on-Si (111) diodes with ferromagnetic Schottky-tunnel electrodes"
International Symposium on Novel maTerials and quantum Technologies (ISNTT) 2021, online, December 14-17, 2021.

Y. Wagatsuma, Md. M. Alam, K. Okada, R. Kanesawa, M. Yamada, K. Hamaya and K. Sawano:
"Suppression of crack formation and propagation in strained SiGe by patterning Ge-on-Si substrates"
21st International Conference on Molecular Beam Epitaxy (ICMBE), Virtual Conference, Mexico, September 6-9, 2021.


-2020年-

Shingo Kaneta-Takada, Michihiro Yamada, Shoichi Sato, Shoma Arai, Le Duc Anh, Kohei Hamaya, and Shinobu Ohya：
"Enhancement of the spin Hall angle by the interdiffusion of atoms in Co2FeAl0.5Si0.5/n-Ge heterostructures"
65th Annual Conference on Magnetism and Magnetic Materials (MMM) 2020, online, Novenber 2-6, 2020.

Michihiro Yamada, Teppei Matsuoka, Tokio Ueno, Takahiro Naito, Shinya Yamada, Kentarou Sawano and Kohei Hamaya
"Thermal stability at the interface between ferromagnetic alloys and germanium for semiconductor spintronics devices"
PRiME 2020(the joint international meeting of ECS, ECSJ, and KECS), online, October 4-9, 2020.

Youya Wagatsuma, Md. Mahfuz Alam, Kazuya Okada, Yusuke Hoshi, Michihiro Yamada, Kohei Hamaya and Kentarou Sawano
"Increased critical thickness of strained SiGe on Ge-on-Si(111)"
PRiME 2020(the joint international meeting of ECS, ECSJ, and KECS), online, October 4-9, 2020.

Kentarou Sawano, Youya Wagatsuma, Md. Mahfuz Alam, Kaisei Omata, Kenta Niikura, Shougo Shibata, Yusuke Hoshi, Michihiro Yamada and Kohei Hamaya
"Strain engineering of Si/Ge heterostructures on Ge-on-Si platform"
PRiME 2020(the joint international meeting of ECS, ECSJ, and KECS), online, October 4-9, 2020.


-2019年-

S. Yamada, Y. Teramoto, T. Murata, D. Matsumi , K. Kudo, T. Taniyama, K. Hamaya ：
"Magnetic properties of a Co2FeSi/BaTiO3interfacial multiferroic system "
Materials Research Meeting (MRM) 2019, Yokohama Symposia, Yokohama, Japan, December 10-14, 2019.

S. Yamada, H. Higashi, T. Kanashima, and K. Hamaya：
" Flexible ferromagnetic Co2FeSi films on flexible Ge(111)"
8th International Symposium on Control of Semiconductor Interfaces(ISCSI-8), Tohoku university, Sendai, Japan, November 27-30, 2019.

A. Yamada, T. Shiihara, M. Yamada, M. Honda, S. Yamada, and K. Hamaya:
"Enhancement in room-temperature magnetoresistance ratio in p-Ge based vertical spin-valve devices with a Co2FeSi layer"
8th International Symposium on Control of Semiconductor Interfaces(ISCSI-8), Tohoku university, Sendai, Japan, November 27-30, 2019.

T. Naito, M. Yamada, S. Yamada, K. Sawano, K. Hamaya:
"Inverse local magnetoresistance effect up to room temperature in ferromagnet-semiconductor lateral spin-valve devices"
8th International Symposium on Control of Semiconductor Interfaces(ISCSI-8), Tohoku university, Sendai, Japan, November 27-30, 2019.

M. Honda, T. Shiihara, M. Yamada, S. Yamada, K. Hamaya:
"Germanium PN junctions between ferromagnetic CoFe and Fe3Si layers for spintronic applications"
8th International Symposium on Control of Semiconductor Interfaces(ISCSI-8), Tohoku university, Sendai, Japan, November 27-30, 2019.

K. Kudo, S. Yamada, A. N. Hattori, H. Tanaka, K. Hamaya:
"Observation of positive linear magnetoresistance in epitaxial Mn2CoAl films"
64th Annual Conference on Magnetism and Magnetic Materials (MMM) 2019, Rio All-Suite Hotel & Casino, Las Vegas, USA, November 4-8, 2019.

T. Shiihara , M. Yamada , M. Honda , S. Yamada, K. Hamaya:
"Room-temperature spin-dependent transport through Sb-doped Ge in vertical spin-valve devices"<
64th Annual Conference on Magnetism and Magnetic Materials (MMM) 2019, Rio All-Suite Hotel & Casino, Las Vegas, USA, November 4-8, 2019.

S. Yamada, R. Honda, Y. Goto, S. Ichikawa, J. Tatebayashi, Y. Fujiwara, K. Hamaya ：
"Magnetic and electrical properties of epitaxial Co2FeSi/GaN(0001) heterostructures for spintronic applications "
The 38th Electronic Materials Symposium (EMS-38), THE KASHIHARA, Nara, Japan, October 9-11, 2019.

S. Yamada, Y. Goto, J. Tatebayashi, S. Ichikawa, Y. Fujiwara, and K. Hamaya ：
"High-quality epitaxial growth of half-metallic Co2FeSi films on a Co-terminated GaN(0001) surface"
Compound Semiconductor Week 2019 (CSW 2019), Kasugano International Forum, Nara, Japan, May 19-23, 2019.



-2018年-

M. Yamada, M. Tukahara, Y. Fujita, T. Naito, S. Yamada, K. Sawano, and K. Hamaya:
"Spin transport in Ge and SiGe"
CSRN-Osaka Annual Workshop 2018, Osaka University, Japan, December 13-15, 2018.

M. Yamada, M. Tukahara, T. Naito, Y. Fujita, S. Yamada, K. Sawano, and K. Hamaya：
"Local magnetoresistance effect at room temperature in Co2FeAlxSi1-x/n-Ge lateral spin-valve devices"
One-Day Symposium on Spintronics Properties of Graphene and Related 2D Materials , The University of Tokyo, Japan, November 22, 2018.

T. Shiihara , M. Yamada, S. Sakai , M. Ikawa, S. Yamada, and K. Hamaya：
"One-Day Symposium on Spintronics Properties of Graphene and Related 2D Materials , The University of Tokyo, Japan, November 22, 2018.

Takahiro Naito, Michihiro Yamada, Makoto Tsukahara, Kentarou Sawano, and Kohei Hamaya：
"Spin transport in a Ge-rich SiGe alloy"
2018 European Materials Research Society (E-MRS 2018), Warsaw University of Technology, Warsaw, Porland, September 17-20, 2018.

T. Shiihara, S. Oki, S. Sakai, M. Ikawa, S. Yamada, and K. Hamaya：
"Epitaxial Growth of Sb-doped Ge Layers on Ferromagnetic Fe3Si for Vertical Semiconductor Spintronic Devices "
2018 International Conference on Solid State Devices and Materials (SSDM2018), The University of Tokyo, Japan, September 9-13, 2018.

S. Yamada, S. Kobayashi, K. Arima and K. Hamaya：
"Observation of spin-gapless semiconductor-like magnetotransport in CoFeVSi epitaxial films"
International Conference on Magnetism 2018 (ICM 2018), MOSCONE CENTER 747 HOWARD STREET, Sanfrancisco, USA, July 15-20, 2018.

M. Yamada, T. Naito, M. Tsukahara, S. Yamada, K. Sawano, and K. Hamaya：
"Electrical spin injection and transport in a SiGe alloy"
The 9th International SiGe Technology and Device Meeting (ISTDM), Seminaris Seehotel Potsdam, Germany, May 27-31, 2018.

H. Higashi, K. Kudo, S. Yamada, T. Kanashima, I. Tsunoda, H. Nakashima, and K. Hamaya：
"Flexible thin-film transistors with crystalline germanium layers"
The 9th International SiGe Technology and Device Meeting (ISTDM), Seminaris Seehotel Potsdam, Germany, May 27-31, 2018.

M. Ishikawa, M. Tsukahara, M. Yamada, Y. Saito, and K. Hamaya：
"Large local magnetoresistance in Si<100> devices at room temperature"
INTERMAG 2018, Marina Bay Sands Convention Center, Singapore, April 23-27, 2018.

M. Tsukahara, M. Yamada, T. Naito, Y. Fujita, S. Yamada, K. Sawano, and K. Hamaya：
"Observation of local spin signals at room temperature in germanium lateral devices"
INTERMAG 2018, Marina Bay Sands Convention Center, Singapore, April 23-27, 2018.


-2017年-

M. Yamada, Y. Fujita, M.Tsukahara, S. Yamada, K. Sawano, and K. Hamaya：

"Donor-Induced Spin Relaxation in n-Ge"
The 9th International school and conference on Spintech, Fukuoka, Japan, June 4-8, 2017.

S. Oki, Y. Fujita, M.Tsukahara, S. Yamada, K. Sawano, and K. Hamaya：
"Local Magnetoresistance in a Co2FeAl0.5Si0.5/n+-Ge lateral spin valve"
The 9th International school and conference on Spintech, Fukuoka, Japan, June 4-8, 2017.

M. Ishikawa, T. Oka, Y. Fujita, H. Sugiyama, Y. Saito, and K. Hamaya：
"Spin Relaxation Mechanism in Heavily Doped n-type Silicon"
The 9th International school and conference on Spintech, Fukuoka, Japan, June 4-8, 2017.

K. Arima, Y. Togami, S. Yamada, and K. Hamaya：
"Anomalous Hall effect of Mn2CoAl films grown by low-temperature molecular beam epitaxy"
The 9th International school and conference on Spintech, Fukuoka, Japan, June 4-8, 2017.

M. Tsukahara, Y. Fujita, M. Yamada, S. Yamada, K. Sawano, and K. Hamaya：
"Giant Enhancement of Nonlocal Spin Signals in n-Ge using Co2FeAl0.5Si0.5 Electrodes"
The 9th International school and conference on Spintech, Fukuoka, Japan, June 4-8, 2017.

M. Ikawa, M. Kawano, S. Sakai, H. Sato, S. Yamada, and K. Hamaya：
"Spin Transport in Fully Epitaxial CoFe/p-Ge/Fe3Si Structures"
The 9th International school and conference on Spintech, Fukuoka, Japan, June 4-8, 2017.

Shuichiro Sakai, Makoto Kawano, Masahiko Ikawa, Hiroshi Sato, Shinya Yamada, Takeshi Kanashima, and Kohei Hamaya：
"Low-temperature growth of all-epitaxial CoFe/Ge/Fe3Si layers on Si for vertical-type semiconductor spintronic devices"
The 10th International Conference on Silicon Epitaxy and heterostructures, Warwick, UK, May 14-19, 2017.

Kohei Kudo, Hidenori Higashi, Mario Nakano, Shinya Yamada, Keisuke Yamamoto, Takeshi Kanashima, Isao Tsunoda, Hiroshi Nakashima, and Kohei Hamaya：
"Electrical properties of pseudo-single-crystalline Ge film grown on SiNx/SiO2 substrates"
The 10th International Conference on Silicon Epitaxy and heterostructures, Warwick, UK, May 14-19, 2017.



-2016年-

Michihiro Yamada, Yuichi Fujita, Shinya Yamada, Takeshi Kanashima, Kentarou Sawano, and Kohei Hamaya:

"Spin absorption affect at ferromagnetic alloy/n+-Ge interfaces"
61st Anuual Magnetism and Magnetic Materials Conference (MMM 2016), New Orleans(Louisiana), October 31-November 4, 2016.

Soichiro Oki, Takayuki Kurokawa, Syuta Honda, Shinya Yamada, Takeshi Kanashima, Hiroyoshi Itoh, and Kohei Hamaya：
"Robust spin-current injection in lateral spin valves with two-terminal Co2FeSi spin injectors"
61st Anuual Magnetism and Magnetic Materials Conference (MMM 2016), New Orleans(Louisiana), October 31-November 4, 2016.

Makoto Kawano, Kohei Santo, Masahiko Ikawa, Shuichiro Sakai, Shinya Yamada, Takeshi Kanashima, and Kohei Hamaya：
"Hole spin transport in epitaxial p-Ge(111) layers"
61st Anuual Magnetism and Magnetic Materials Conference (MMM 2016), New Orleans(Louisiana), October 31-November 4, 2016.

Yuichi Fujita, Michihiro Yamada, Shinya Yamada, Kentarou Sawano, Takeshi Kanashima, and Kohei Hamaya：
"Short spin diffusion length of n+-Ge at low temperatures"
61st Anuual Magnetism and Magnetic Materials Conference (MMM 2016), New Orleans(Louisiana), October 31-November 4, 2016.

Kento Yamasaki, Keisuke Arima, Togami Yuki, Tsukahara Makoto, Shinya Yamada, Takeshi Kanashima, and Kohei Hamaya：
"Magnetic and electrical properties of MBE-grown Mn2CoAl films"
61st Anuual Magnetism and Magnetic Materials Conference (MMM 2016), New Orleans(Louisiana), October 31-November 4, 2016.

A. M. Spiesser, H. Saito, Y. Fujita, S. Yamada, K. Hamaya, S. Yuasa and R. Jansen：
"Spin accumulation up to 10 meV in Si non-local devices with MgO/Fe tunnel contacts"
61st Anuual Magnetism and Magnetic Materials Conference (MMM 2016), New Orleans(Louisiana), October 31-November 4, 2016

S. E. Glover, T. Saerbeck, B. Kuerbanjiang, Z. Nedelkoski, D. Kepaptsoglou, A. Ghasemi, S. Yamada, C. Burrows, Q. M. Ramasse, P. J. Hasnip, K. Hamaya, A. Hirohata, V. Lazarov, T.P. Hase, and G. Bell：
"Nanometer resolved profiles of half-metallic full Heusler alloy thin films determined from polarised neutron"
61st Anuual Magnetism and Magnetic Materials Conference (MMM 2016), New Orleans(Louisiana), October 31-November 4, 2016.

B. Kuerbanjiang, Z. Nedelkoski, D. Kepaptsoglou, A. Ghasemi, S. E. Glover, S. Yamada, A. Sanchez, Q. M. Ramasse, T. P. Hase, G. Bell, K. Hamaya, A. Hirohata and V. Lazarov：
"Atomic and Electronic study of Co2FeAl0.5Si0.5/Ge(111) interface"
61st Anuual Magnetism and Magnetic Materials Conference (MMM 2016), New Orleans(Louisiana), October 31-November 4, 2016.

S. Oki, M. Kawano, Y. Fujita, M. Yamada, S. Yamada, T. Kanashima, and K. Hamaya:
"Spin transport in n-Ge and p-Ge"
International workshop on nano-spin conversion science and quantum spin dynamics, Tokyo, Japan, October 12-15, 2016.

Shinya Yamada, Tomoyasu Taniyama, and Kohei Hamaya：
"Exchange coupling induced by epitaxial B2-FeRh layers grown on ferromagnets"
9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids, Kobe, Japan, August 8-11, 2016.

Soichiro Oki, Shinya Yamada, Takeshi Kanashima, Yukio Nozaki, and Kohei Hamaya：
"Damping constant modulation of Fe3Si by a giant pure spin current"
9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids, Kobe, Japan, August 8-11, 2016.

Makoto Kawano, Kohei Santo, Masahiko Ikawa, Shinya Yamada, Takeshi Kanashima, and Kohei Hamaya：
"Spin transport in p-Ge up to 125 K using a Ge/Fe3Si structure"
9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids, Kobe, Japan, August 8-11, 2016.

Yuichi Fujita, Michihiro Yamada, Shinya Yamada, Kentarou Sawano, Takeshi Kanashima, and Kohei Hamaya：
"Electrical spin injection and detection at room temperature in n-Ge based lateral spin valves with Co2FeSi0.5Al0.5/n+-Ge Schottky tunnel contacts"
9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids, Kobe, Japan, August 8-11, 2016.

Keisuke Arima, Michihiro Yamada, Yuichi Fujita, Kentarou Sawano, Shinya Yamada, Takeshi Kanashima, and Kohei Hamaya：
"Electrical properties in Co2FeSi1-xAlx/n+-Ge contacts with phosphorous δ-doping and silicon-layer insertions"
9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids, Kobe, Japan, August 8-11, 2016.

Kento Yamasaki, Keisuke Arima, Shinya Yamada, Takeshi Kanashima, and Kohei Hamaya：
"Molecular beam epitaxy of Mn2CoAl films on MgAl2O4 (100)"
9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids, Kobe, Japan, August 8-11, 2016.

Takayuki Kurokawa, Soichiro Oki, Shinya Yamada, Takeshi Kanashima, and Kohei Hamaya：
"Pure spin current transport in a Kondo alloy Cu(Fe)"
9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids, Kobe, Japan, August 8-11, 2016.

Takayasu Oka, Mizue Ishikawa, Yuichi Fujita, Shinya Yamada, Takeshi Kanashima, Yoshiaki. Saito, and Kohei Hamaya：
"Enhancement of room-temperature spin signals in n+-Si-based lateral spin devices"
9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids, Kobe, Japan, August 8-11, 2016.

Kohei Santo, Makoto Kawano, Masahiko Ikawa, Shinya Yamada, Takeshi Kanashima, and Kohei Hamaya：
"Spin-dependent transport in all-epitaxial Fe3Si/Ge/ Fe3Si spin valves"
9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids, Kobe, Japan, August 8-11, 2016.

Shuichiro Sakai, Masahiko Ikawa, Makoto Kawano, Shinya Yamada, Takeshi Kanashima, and Kohei Hamaya：
"Epitaxial growth of Fe3Si films on low-temperature-grown Ge layers"
9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids, Kobe, Japan, August 8-11, 2016.

Masahiko Ikawa, Shuichiro Sakai, Makoto kawano, Shinya Yamada, Takeshi Kanashima, and Kohei Hamaya：
"Magnetic properties of Fe3Si films on low-temperature-grown germanium layers"
The 18th International Conference on Crystal Growth and Epitaxy, Nagoya, Japan, August 7-12, 2016.

Kenji Kasahara, Hidenori Higashi, Mario Nakano, Yuta Nagatomi, Keisuke Yamamoto, Hiroshi Nakashima, and Kohei Hamaya：
"Effect of post annealing on hole mobility of pseudo-single-crystalline germanium thin-film-transistors on glass substrate"
7th International Symposium on Control of Semiconductor Interfaces/International SiGe Technology and Device Meeting, Nagoya, Japan, June 7-11, 2016

Michihiro Yamada, Yuichi Fujita, Shinya Yamada, Kentarou Sawano, and Kohei Hamaya：
"Control of electrical properties in Heusler-alloy/Ge Schottky tunnel contacts formed by phosphorous δ-doping with Si-layer insertion"
7th International Symposium on Control of Semiconductor Interfaces/International SiGe Technology and Device Meeting, Nagoya, Japan, June 7-11, 2016.

Yuichi Fujita, Michihiro Yamada, Shinya Yamada, Kentarou Sawano, Takeshi Kanashima, and Kohei Hamaya：
"Room-temperature electrical spin injection and detection in n-Ge through Co2Fe0.5SiAl0.5/n+-Ge Schottky tunnel contacts"
7th International Symposium on Control of Semiconductor Interfaces/International SiGe Technology and Device Meeting, Nagoya, Japan, June 7-11, 2016.

Hidenori Higashi, Mario Nakano, Kenji Kasahara, Shinya Yamada, Takeshi Kanashima, and Kohei Hamaya：
"High hole mobility in pseudo-single-crystalline germanium films on flexible substrates"
2016 MRS Spring Meeting, EP-14, Phoenix, Alizona, USA, March 28-April 1, 2016.

Takayuki Kurokawa, Soichiro Oki, Shinya Yamada, Takeshi Kanashima, Tomoyasu Taniyama, and Kohei Hamaya：
"Nonlocal spin transport in a Kondo alloy Cu(Fe) in lateral spin valves with Co2FeSi electrodes"
2016 Joint MMM-intermag Conference, GD-08, San Diego, California, USA, January 11-15, 2016.

Shinya Yamada, Kohei Tanikawa, Junya Hirayama, Takeshi Kanashima, Tomoyasu Taniyama, and Kohei Hamaya：
"Exchange coupling in epitaxially grown multilayers with B2-FeRh"
2016 Joint MMM-intermag Conference, GS-06, San Diego, California, USA, January 11-15, 2016.


-2015年-

Yuichi Fujita, Takayasu Oka, Yuta Nagatomi, Keisuke Yamamoto, Michihiro Yamada, Kentarou Sawano, Shinya Yamada, Takeshi Kanashima, and Kohei Hamaya：

"Low-temperature Fabrication of a Gate Stack Structure for Ge-based Spin-MOSFET"
2015 International Workshop on DIELECTRIC THIN FILMS FOR FUTURE ELECTRON DEVICES -SCIENCE AND TECHNOLOGY- (2015 IWDTF), P-5, Tokyo, Japan, November 2-4, 2015.

Takeshi Kanashima, Hiroshi Nohira, Masato Zenitaka, Taro Kobayashi, Riku Yamashiro, Shinya Yamada,
and Kohei Hamaya：
"Study of Epitaxial La2O3 High-k/Ge(111) Interface by X-ray Photoelectron Spectroscopy"
2015 International Workshop on DIELECTRIC THIN FILMS FOR FUTURE ELECTRON DEVICES -SCIENCE AND TECHNOLOGY- (2015 IWDTF), P-4, Tokyo, Japan, November 2-4, 2015.

Kento Yamasaki, Soichiro Oki, Shinya Yamada, Takeshi Kanashima, and Kohei Hamaya：
"Spin dependent Peltier effect in a lateral spin-valve device with epitaxial Heusler-compound electrodes"
20th International Conference on Magnetism (ICM2015), Th.H-P2, Barcelona, Spain, July 5-10, 2015.

Makoto Kawano, Kohei Santo, Soichiro Oki, Shinya Yamada, Takeshi Kanashima, and Kohei Hamaya：
"Spin transport through high-quality epitaxial Ge/Fe3Si heterostructures in Cu-based lateral spin valves"
20th International Conference on Magnetism (ICM2015), MO.D-P19, Barcelona, Spain, July 5-10, 2015.

Kohei Hamaya, Yuichi Fujita, Makoto Kawano, Kenji Kasahara, and Shinya Yamada：
"Germanium-based spintronics with high-quality Heusler compounds"
The 1st 【ImPACT】International Symposium on Spintronic Memory, Circuit and Strage, Tokyo, Japan, June 21-22,2015.

Kento Yamasaki, Soichiro Oki, Shinya Yamada, Takeshi Kanashima, and Kohei Hamaya：
"Spin dependent Peltier effect in Co2FeSi/Cu lateral spin-valve devices"
New Perspectives in Spintronics and Mesoscopic Physics, PS-38, Tokyo, Japan, June 10-12,2015.

Makoto Kawano, Kohei Santo, Soichiro Oki, Shinya Yamada, Takeshi Kanashima and Kohei Hamaya：
"Electrical spin injection and detection across epitaxial Ge/Fe3Si heterointerfaces"
New Perspectives in Spintronics and Mesoscopic Physics, PS-36, Tokyo, Japan, June 10-12,2015.



-2014年-

Yoshiaki Saito, Mizue Ishikawa, Tetsufumi Tanamoto, Tomoaki Inokuchi, Hideyuki Sugiyama, Kohei Hamaya, and Nobuki Tezuka：

"Correlation between amplitude of spin accumulation signals investigated by Hanle effect measurement and effective junction barrier height in CoFe/MgO/n+-Si junctions"
59th Anuual Magnetism and Magnetic Materials Conference (MMM 2014), ES-05, Honolulu, Hawaii, November 3-7,2014.

Mizue Ishikawa, Hideyuki Sugiyama, Tomoaki Inokuchi, Tetsufumi Tanamoto, Kohei Hamay, Nobuki Tezuka, and Yoshiaki Saito：
"Influence of interface roughness in CoFe/MgO/n+-Si junctions on spin accumulation and spin transport signals"
59th Anuual Magnetism and Magnetic Materials Conference (MMM 2014), FB-12, Honolulu, Hawaii, November 3-7,2014.

R. Ohshima, A. Sakai, Y. Ando, T. Shinjo, K. Hamaya, K. Kawahara, H. Ago, and M. Shiraishi：
"Spin-charge conversion in CVD-grown single-layer graphene at room temperature"
59th Anuual Magnetism and Magnetic Materials Conference (MMM 2014), FB-03, Honolulu, Hawaii, November 3-7,2014.

M. Kawano, S. Yamada, M. Miyao, and K. Hamaya:
"Low-temperature grown Ge1-xSnx layers on a metallic sillicide"
International SiGe Technology and Device Meeting (ISTDM 2014), P3, Sigapore, June 2-4, 2014.

H. Higashi, Y. Fujita, M. Kawano, J. Hirayama, S. Yamada, J.-H Park, T. Sadoh, M. Miyao, and K. Hamaya:
"Effect of Sn-doped Ge insertion layers on epitaxial growth of ferromagnetic Fe3Si films on a flexible substrate"
International SiGe Technology and Device Meeting (ISTDM 2014), 7.3, Sigapore, June 2-4, 2014.

J. Hirayama, K. Tanikawa, M. Kawano, S. Yamada, M. Miyao, and K. Hamaya:
"An all epitaxial Fe3Si/FeSi/Co2FeSi trilayer grown by room-temperature molecular beam epitaxy"
IEEE International Magnetics Conference (Intermag 2014), CT-6, Dresden, Germany, May 4-8, 2014.

K. Kasahara, Y. Fujita, S. Yamada, K. Sawano, M. Miyao, and K. Hamaya:
"Generation and detection of pure spin current in n-Ge using L21-ordered Co2FeSi electrodes"
IEEE International Magnetics Conference (Intermag 2014), BE-6, Dresden, Germany, May 4-8, 2014.