論文 - スピン偏極陽電子消滅法によるスピン物性研究

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スピン偏極陽電子消滅法によるスピン物性研究

2023

Robustness of semimetallic transport properties of TaAs against　off-stoichiometric disorder
A. Kawasuso, M. Suda, H. Murakawa, M. Komada,C. Suzuki, H. Amada, K. Michishio, M. Maekawa, A. Miyashita, N. Seko, S. Yamamoto, N. Oshima, S. Seki, and N.  Hanasaki
J. Appl. Phys. 133(2023) 223903-1-6.

2022

High-density magnetic-vacancy inclusion in Co₂MnGa single crystal probed by spin-polarized positron annihilation spectroscopy
A. Miyashita, M. Maekawa, Y. Shimoyama, N. Seko, A. Kawasuso, and R. Y. Umetsu
J. Phys.: Condens. Matter 34 (2022) 045701-1-9.

2021

Effect of disorder and vacancy defects on electrical transport properties of Co₂MnGa thin films grown by magnetron sputtering
A. Miyashita, M. Maekawa, C. Suzuki, S. Yamamoto, A. Kawasuso, J. Wang, T. Seki, R. Y. Umetsu, and K. Takanashi
J. Appl. Phys. 130 (2021) 225301-1-7.

Spin-Polarized Positronium Time-of-Flight Spectroscopy for Probing Spin-Polarized Surface Electronic States
M. Maekawa, A. Miyashita, S. Sakai, S. Li, S. Entani, and A. Kawasuso
Phys. Rev. Lett. 126 (2021) 186401-1-6.

2020

Development a new positron source for spin-polarized positron beam generation
M. Maekawa, K. Wada, and A. Kawasuso
Nucl. Inst. Meth. Phys. Res. B 480 (2020) 49-55.

Gadolinium-implanted GaN studied by spin-polarized positron annihilation spectroscopy
M. Maekawa, A. Miyashita, S. Sakai, and A. Kawasuso
Phys. Rev. B 102 (2020) 054427-1-8.

Spin polarization of graphene on Co₂FeGe_0.5Ga_0.5(001) observed by spin-polarized surface positronium spectroscopy
A. Miyashita, S. Li, S. Sakai, M. Maekawa, and A. Kawasuso
Phys, Rev. B 102 (2020) 045425-1-4.

2018

Spin-Polarized Positron Annihilation Measurement on Ga Vacancies in p-type GaN
M. Maekawa, S. Sakai, A. Miyashita, A. Kawasuso
e-J. Surf. Sci. Nanotech. 16 (2018) 347-350.

Spin polarization of graphene and h-BN on Co(0001) and Ni(111) observed by spin-polarized surface positronium spectroscopy
A. Miyashita, M. Maekawa, K. Wada, A. Kawasuso, T. Watanabe, S. Entani, and S. Sakai
Phys. Rev. B, 97 (2018) 195405-1-5.

2017

Vacancy-induced ferromagnetism in ZnO probed by spin-polarized positron annihilation spectroscopy
M. Maekawa, H. Abe, A. Miyashita, S. Sakai, S. Yamamoto, and A. Kawasuso
Appl. Phys. Lett., 110 (2017) 172402-1-5.

Vacancy-mediated ferromagnetism in Co-implanted ZnO studied using a slow positron beam
D. D. Wnag, B. Zhao, N. Qi, Z. Q. Chen and  A. Kawasuso
J. Mater. Sci, 52 (2017) 7067-7076.

Spin-Polarized Positron Annihilation Study on Some Ferromagnets
H. Li, M. Maekawa, A. Miyashita, A. Kawasuso
Defect and Diffusion Forum, 373 (2017) 65-70.

Construction of a surface positronium lifetime spectroscopy apparatus with a spin-polarized low energy positron beam
M. Maekawa, K. Wada, A. Miyashita and A. Kawasuso
J. Phys. Conf. Ser. 791 (2017) 021009.

2015

スピン偏極陽電子ビームの応用研究
河裾厚男
放射線と産業 139号(2015) 18-22.

Effect of magnetic field on positronlifetimes of Fe, Co and Ni
H. Li, M. Maekawa, A. Kawasuso and N. Tanimura
J. Phys. Condens. Matter 27 (2015) 246001-1-5.

Charge-to-spin conversion and spin diffusion in Bi/Ag bilayers observed by spin-polarized positron beam
H. J. Zhang, S. Yamamoto, B. Gu, H. Li, M. Maekawa, Y. Fukaya, and A. Kawasuso
Phys. Rev. Lett. 114 (2015) 166602-1-5.

放射性同位体を用いたスピン偏極陽電子ビーム
河裾厚男
陽電子科学4 (2015) 9-22.

2014

Doppler-Broadening of Annihilation Radiation Spectroscopy under High Magnetic Field Using a Longitudinally Spin-polarized Slow Positron Beam
M. Maekawa, H. Zhang, H. Li,Y. Fukaya, A. Kawasuso
Jpn. J. Appl. Phys. Conf. Proc. 2 (2014) 011305-1-7.

Spin polarizations of positron beams generated using electrostatic and magnetic transportation systems with 68Ge and 22Na sources
M. Maekawa, Y. Fukaya, H. Zhang, H. Li and A. Kawasuso
J. Phys. Conf. Ser. 505 (2014) 012033(4).

Current-induced spin polarization on metal surfaces probed by spin-polarized positron beam
H. J. Zhang, S. Yamamoto, Y. Fukaya, M. Maekawa, H. Li, A. Kawasuso, T. Seki, E. Saitoh& K. Takanashi
Scientific Reports 4 (2014) 04844.

2013

Spin-polarized positron annihilation spectroscopy for spintronics applications
A. Kawasuso, Y. Fukaya, M. Maekawa, I. Mohizuki, and H. Zhang
J. Phys. Conf. Ser. 443 (2013) 012084(4).

Current-induced spin polarization on a Pt surface : A new approach using spin-polarized positron annihilation spectroscopy
A. Kawasuso, Y. Fukaya, M. Maekawa, H. Zhang, T. Seki, T.Yoshino, E. Saitoh, K. Takanashi
J. Mag. Mag. Mater. 342 (2013) 139-143.

Development of spin-polarized slow positron beam using a 68Ge-68Ga positron source
M. Maekawa, Y. Fukaya, A. Yabuuchi, I. Mochizuki, A. Kawasuso
Nucl. Inst. Meth. Phys. Res. B 308 (2013) 9-14.

2012

Doppler broadening of annihilation radiation measurements on 3d and 4f ferromagnets using polarized positrons
A. Kawasuso, M. Maekawa, Y. Fukaya, A. Yabuuchi and I. Mochizuki
Phys. Rev. B 85 (2012) 024417(6).

2011

Spin-polarized positron annihilation measurements on polycrystalline Fe, Co, Ni and Gd based on Doppler broadening of annihilation radiation
A. Kawasuso, M. Maekawa, Y. Fukaya. A. Yabuuchi and I. Mochizuki
Phys. Rev. B 83 (2011) 100406(R).

Development of spinpolarized positron beam using high energy proton beam
M. Maekawa, A. Kawasuso, Y. Fukaya, A. Yabuuchi
J. Phys. Conf. Ser. 262 (2011) 012035.

2010

Development of Spin-Polarized Positron Beam
A. Kawasuso, Y. Fukaya, M. Maekawa and A. Yabu-uchi
J. Phys. Conf. Ser. 225 (2010) 012028.

2008

Spin polarization of an electrostatic positron beam
A. Kawasuso and M. Maekawa
Appl. Surf. Sci. 255 (2008) 108-110.