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Journal Articles

Perpendicular magnetic anisotropy of thin films

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.

Journal Articles

Uniaxial magnetic anisotropy of L1$$_{0}$$-FeNi films with island structures on LaAlO$$_{3}$$(110) substrates by nitrogen insertion and topotactic extraction

Nishio, Takahiro*; Ito, Keita*; Kura, Hiroaki*; Takanashi, Koki; Yanagihara, Hideto*

Journal of Alloys and Compounds, 976, p.172992_1 - 172992_8, 2024/03

 Times Cited Count:2 Percentile:42.11(Chemistry, Physical)

Journal Articles

Ferromagnetic crossover within the ferromagnetic order of U$$_{7}$$Te$$_{12}$$

Opletal, P.; Sakai, Hironori; Haga, Yoshinori; Tokiwa, Yoshifumi; Yamamoto, Etsuji; Kambe, Shinsaku; Tokunaga, Yo

Journal of the Physical Society of Japan, 92(3), p.034704_1 - 034704_5, 2023/03

 Times Cited Count:1 Percentile:34.43(Physics, Multidisciplinary)

We investigate the physical properties of a single crystal of uranium telluride U$$_{7}$$Te$$_{12}$$. We have confirmed that U$$_{7}$$Te$$_{12}$$ crystallizes in the hexagonal structure with three nonequivalent crystallographic uranium sites. The paramagnetic moments are estimated to be approximately 1 $$mu_{B}$$ per the uranium site, assuming a uniform moment on all the sites. A ferromagnetic phase transition occurs at $$T_{rm C}$$= 48 K, where the in-plane magnetization increases sharply, whereas the out of-plane component does not increase significantly. With decreasing temperature further below $$T_{rm C}$$ under field-cooling conditions, the out-of-plane component increases rapidly around T$$^{star}$$= 26 K. In contrast, the in-plane component hardly changes at T$$^{star}$$. Specific heat measurement indicates no $$lambda$$-type anomaly around T$$^{star}$$, so this is a cross-over suggesting a reorientation of the ordering moments or successive magnetic ordering on the part of the multiple uranium sites.

Journal Articles

Spin-orbit-induced Ising ferromagnetism at a van der Waals interface

Matsuoka, Hideki*; Barnes, S. E.*; Ieda, Junichi; Maekawa, Sadamichi; Bahramy, M. S.*; Saika, B. K.*; Takeda, Yukiharu; Wadachi, Hiroki*; Wang, Y.*; Yoshida, Satoshi*; et al.

Nano Letters, 21(4), p.1807 - 1814, 2021/02

 Times Cited Count:17 Percentile:76.87(Chemistry, Multidisciplinary)

Journal Articles

Quasi-one-dimensional magnetic interactions and conduction electrons in EuCu$$_5$$ and EuAu$$_5$$ with the characteristic hexagonal structure

Matsuda, Shinya*; Ota, Joji*; Nakaima, Kenri*; Iha, Wataru*; Gochi, Jun*; Uwatoko, Yoshiya*; Nakashima, Miho*; Amako, Yasushi*; Honda, Fuminori*; Aoki, Dai*; et al.

Philosophical Magazine, 100(10), p.1244 - 1257, 2020/04

 Times Cited Count:4 Percentile:22.66(Materials Science, Multidisciplinary)

Journal Articles

A Study of defect structures in fast neutron irradiated nickel and ion by measurements of magnetic anisotropy

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Radiation-Induced Changes in Microstructure, Part 1, p.27 - 37, 1987/00

no abstracts in English

Journal Articles

A Study of defect structures in fast neutron irradiated nickel at low temperature using magnetic anisotropy measurements

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Journal of the Physical Society of Japan, 55(1), p.193 - 199, 1986/00

 Times Cited Count:0 Percentile:0.00(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Point defects and induced magnetic anisotropy in fast neutron irradiated iron

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Journal of the Physical Society of Japan, 53(12), p.4353 - 4358, 1984/00

 Times Cited Count:9 Percentile:64.76(Physics, Multidisciplinary)

no abstracts in English

Oral presentation

Magnetic anisotropy due to Rashba interaction in antiferromagnets

Ieda, Junichi; Barnes, S. E.*; Maekawa, Sadamichi

no journal, , 

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