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Araki, Yasufumi; Ieda, Junichi
Magune, 20(1), p.12 - 17, 2025/02
Spintronics has been hindered by substantial power losses associated with the electric manipulation of spins. To mitigate Joule heating, we have developed a theory of electrically induced spin torques incorporating the topological structure of electron states. This topological contribution is free from dissipation and significantly enhances the torque efficiency per unit current compared with the conventional spin transfer torque. Our theory is supported by a magnetization switching experiment on ferromagnetic oxide SrRuO, where the observed torque is attributed to a type of topological electrons known as Weyl electrons.
Takanashi, Koki; Seki, Takeshi*
Magune, 19(3), p.100 - 106, 2024/06
Perpendicular magnetic anisotropy of thin films currently plays an important role in spintronics as well as magnetic recording. Regarding perpendicular magnetic anisotropy, in this article, the fundamentals, the research history, and the recent research trends are reviewed, showing specific examples with perpendicular magnetization such as magnetic multilayers, ordered alloy films, rare earth-transition metal amorphous alloy films, and inhomogeneous or granular films. The physical origins for perpendicular magnetic anisotropy, including interface anisotropy due to structural symmetry breaking, magnetoelastic anisotropy due to strain, bulk-type magnetocrystalline anisotropy, and directional pair ordering of atoms, are discussed in each example.
Yamane, Yuta*; Ieda, Junichi
Magune, 13(5), p.235 - 241, 2018/10
Onuma, Yuichi; Matsuo, Mamoru*; Maekawa, Sadamichi; Saito, Eiji
Magune, 12(5), p.217 - 224, 2017/10
no abstracts in English
Sakurai, Hiroshi*; Ito, Masayoshi*; Agui, Akane
Magune, 6(5), p.270 - 276, 2011/10
no abstracts in English
Adachi, Hiroto; Maekawa, Sadamichi
Magune, 5(6), p.256 - 263, 2010/06
Hirano, Tatsumi*; Takeda, Masayasu
Magune, 4(1), p.38 - 42, 2009/01
The characterization of a magnetic interface structure in magnetic multilayer is important for producing good magnetic devices because the device properties strongly depend on the structure. In this report we review a polarized neutron reflectometry to analyze the magnetic interface structure and also mention a future prospect of a neutron experiment.
Ara, Katsuyuki*; Ebine, Noriya
Denki Gakkai Magunetikkusu Kenkyukai Shiryo (MAG-01-55), p.1 - 6, 2001/03
no abstracts in English
Ara, Katsuyuki*; Ebine, Noriya
Denki Gakkai Magunetikkusu Kenkyukai Shiryo (MAG-00-182), p.23 - 31, 2000/09
no abstracts in English
Ebine, Noriya; Suzuki, Masahide; Ara, Katsuyuki*
Denki Gakkai Magunetikkusu Kenkyukai Shiryo (MAG-00-195), p.45 - 48, 2000/09
no abstracts in English
; Ara, Katsuyuki
Denki Gakkai Magunethikkusu Kenkyukai Shiryo MAG-98-198, p.29 - 33, 1998/11
no abstracts in English
; Ara, Katsuyuki
Denki Gakkai Magunethikkusu Kenkyukai Shiryo, p.37 - 41, 1997/07
no abstracts in English
; ; Ara, Katsuyuki;
Denki Gakkai Magunethikkusu Kenkyukai Shiryo; MAG-97-76, 0, p.9 - 20, 1994/00
no abstracts in English
