Okabayashi, Jun*; Suzuki, Kazuya; Mizukami, Shigemi*
Journal of Magnetism and Magnetic Materials, 564, Part2, p.170163_1 - 170163_5, 2022/12
The magnetic atom diffusion at the interface between CoMn alloy and MnGa layer with annealing is studied using X-ray magnetic circular dichroism (XMCD) analysis. We found that the spins in bcc CoMn are coupled parallel to those in perpendicularly magnetized MnGa layer under the as-grown conditions, while the post annealing modulates the interfacial magnetic coupling to antiferromagnetic in Co. The elementspecific hysteresis curves at each absorption edge revealed the large coercive fields in Mn and Co through the exchange coupling with MnGa. After the annealing process, the changes of XMCD spectral line shapes are related to the interfacial reactions promoting the formation of Mn and CoMnGa layers, which is deduced from the analysis oftransmission electron microscopy. The interfacial diffusion of Mn atoms modulates the magnetic exchange coupling between Mn and Co sites and reverses the direction of perpendicular magnetization.
Yamamoto, Kei; Xu, M.*; Puebla, J.*; Otani, Yoshichika*; Maekawa, Sadamichi*
Journal of Magnetism and Magnetic Materials, 545, p.168672_1 - 168672_10, 2022/03
Yokoi, Naoto*; Saito, Eiji
Journal of Magnetism and Magnetic Materials, 545, p.168673_1 - 168673_12, 2022/03
Qi, J.*; Hou, D.*; Chen, Y.*; Saito, Eiji; Jin, X.*
Journal of Magnetism and Magnetic Materials, 534, p.167980_1 - 167980_6, 2021/09
Qin, J.*; Hou, D.*; Chen, Y.*; Saito, Eiji; Jin, X.*
Journal of Magnetism and Magnetic Materials, 501, p.166362_1 - 166362_4, 2020/05
Yamane, Yuta*; Ieda, Junichi
Journal of Magnetism and Magnetic Materials, 491, p.165550_1 - 165550_5, 2019/12
Journal of Magnetism and Magnetic Materials, 479, p.88 - 90, 2019/06
Kameda, Mai*; Hirobe, Daichi*; Daimon, Shunsuke*; Shiomi, Yuki*; Takahashi, Saburo*; Saito, Eiji
Journal of Magnetism and Magnetic Materials, 476, p.459 - 463, 2019/04
Hiraka, Haruhiro*; Yano, Shinichiro*; Fukuda, Tatsuo
Journal of Magnetism and Magnetic Materials, 469, p.629 - 632, 2019/01
Ogata, Yudai; Chudo, Hiroyuki; Gu, B.; Kobayashi, Nobukiyo*; Ono, Masao; Harii, Kazuya; Matsuo, Mamoru; Saito, Eiji; Maekawa, Sadamichi
Journal of Magnetism and Magnetic Materials, 442, p.329 - 331, 2017/11
Journal of Magnetism and Magnetic Materials, 432, p.532 - 538, 2017/06
Agui, Akane; Masuda, Ryo*; Kobayashi, Yasuhiro*; Kato, Tadashi*; Emoto, Shun*; Suzuki, Kosuke*; Sakurai, Hiroshi*
Journal of Magnetism and Magnetic Materials, 408, p.41 - 45, 2016/06
We investigated the magnetization process of Fe (110) film using the field dependence of magnetic Compton scattering and Mssbauer spectroscopy. From the magnetic Compton profiles, the spin and orbital magnetic moment specific magnetization versus magnetizing field curves were obtained. From the Mssbauer spectra, the angles between the magnetizing field and the magnetic moment were obtained. It was found that the magnetizing field dependence of the ratio between orbital moment and spin moment was related to the angles between the magnetizing field and the magnetic moment. We indicate that the magnetic field dependence of the orbital magnetic moment plays a role in the magnetization process.
Xu, Z.; Gu, B.; Mori, Michiyasu; Ziman, T.*; Maekawa, Sadamichi
Journal of Magnetism and Magnetic Materials, 400, p.184 - 187, 2016/02
Journal of Magnetism and Magnetic Materials, 385, p.119 - 123, 2015/07
Kawasuso, Atsuo; Fukaya, Yuki; Maekawa, Masaki; Zhang, H.; Seki, Takeshi*; Yoshino, Tatsuro*; Saito, Eiji*; Takanashi, Koki*
Journal of Magnetism and Magnetic Materials, 342, p.139 - 143, 2013/09
Transversely spin-polarized positrons were injected near Pt and Au surfaces under an applied electric current. The three-photon annihilation of spin-triplet positronium, which was emitted from the surfaces into vacuum, was observed. When the positron spin polarization was perpendicular to the current direction, the maximum asymmetry of the three-photon annihilation intensity was observed upon current reversal for the Pt surfaces, whereas it was significantly reduced for the Au surface. The experimental results suggest that electrons near the Pt surfaces were in-plane and transversely spin-polarized with respect to the direction of the electric current. The maximum electron spin polarization was estimated to be more than 0.01 (1%).
Sakai, Seiji; Mitani, Seiji*; Matsumoto, Yoshihiro; Entani, Shiro; Avramov, P.; Otomo, Manabu; Naramoto, Hiroshi*; Takanashi, Koki
Journal of Magnetism and Magnetic Materials, 324(12), p.1970 - 1974, 2012/06
Agui, Akane; Asahi, Toru*; Sayama, Junichi*; Mizumaki, Masaichiro*; Tanaka, Masahito*; Osaka, Tetsuya*
Journal of Magnetism and Magnetic Materials, 320(22), p.3015 - 3018, 2008/11
no abstracts in English
Inami, Toshiya; Homma, Tetsuo*; Tsutsui, Satoshi*; Indo, Kentaro*; Onodera, Hideya*; Ishii, Kenji; Owada, Kenji; Kuzushita, Kaori*; Nakao, Hironori*; Murakami, Yoichi*
Journal of Magnetism and Magnetic Materials, 310(2, Part1), p.748 - 750, 2007/03
We investigated successive phase transitions in SmBC at =37K and =51K by means of resonant X-ray diffraction. Strong resonant diffraction signal is observed at the 101 reflection below at the Sm edge, whereas in the intermediate phase signals appear at incommensurate positions =(1, ,1) where =0.13. Accordingly, the successive phase transitions in SmBC is found to be commensurate-to-incommensurate magnetic phase transitions.
Ito, Shinichi*; Kajimoto, Ryoichi; Adams, M. A.*; Bull, M. J.*; Iwasa, Kazuaki*; Aso, Naofumi*; Yoshizawa, Hideki*; Takeuchi, Tetsuya*
Journal of Magnetism and Magnetic Materials, 310(2, Part2), p.1549 - 1551, 2007/03
We investigated static and dynamical properties in the three-dimensional percolating Heisenberg antiferromagnets, RbMnMgF, with the magnetic concentration close to the percolation threshold, , around the superlattice point well below . In neutron diffraction experiment, the wave number dependence of the elastic scattering component was well fitted to . Magnetic fractons were also studied using inelastic neutron scattering, and the observed fractons showed the dispersion relation of . The determined exponents, and , were in good agreement with the fractal dimension ().
Oishi, Kazuki; Heffner, R. H.; Morris, G. D.*; Fluss, M. J.*; Bauer, E. D.*; Morales, L. A.*; Sarrao, J. L.*; MacLaughlin, D. E.*; Shu, L.*; Ito, Takashi; et al.
Journal of Magnetism and Magnetic Materials, 310(2, Part1), p.566 - 568, 2007/03
no abstracts in English