JOPSS - Search Results

Journal Articles

Spin Hall magnetoresistance in quasi-two-dimensional antiferromagnetic-insulator/metal bilayer systems

Ishikawa, Takuto*; Matsuo, Mamoru; Kato, Takeo*

Physical Review B, 107(5), p.054426_1 - 054426_9, 2023/02

https://doi.org/10.1103/PhysRevB.107.054426

Times Cited Count：0 Percentile：0(Materials Science, Multidisciplinary)

Journal Articles

Observation of domain structure in non-collinear antiferromagnetic MnSn thin films by magneto-optical Kerr effect

Uchimura, Tomohiro*; Yoon, J.-Y.*; Sato, Yuma*; Takeuchi, Yutaro*; Kanai, Shun*; Takechi, Ryota*; Kishi, Keisuke*; Yamane, Yuta*; DuttaGupta, S.*; Ieda, Junichi; et al.

Applied Physics Letters, 120(17), p.172405_1 - 172405_5, 2022/04

https://doi.org/10.1063/5.0089355

Times Cited Count：10 Percentile：83.82(Physics, Applied)

Journal Articles

Intrinsic torques emerging from anomalous velocity in magnetic textures

Araki, Yasufumi; Ieda, Junichi

Physical Review Letters, 127(21), p.277205_1 - 277205_7, 2021/12

https://doi.org/10.1103/PhysRevLett.127.277205

Times Cited Count：5 Percentile：41.09(Physics, Multidisciplinary)

Momentum-space topology of electrons under strong spin-orbit coupling contributes to the electrically induced torques exerting on magnetic textures insensitively to disorder or thermal fluctuation. We present a direct connection between band topology and the torques by classifying the whole torques phenomenologically. As well as the intrinsic anomalous Hall effect, the torques also emerge intrinsically from the anomalous velocity of electrons regardless of a nonequilibrium transport current. We especially point out the intrinsic contribution arising exclusively in magnetic textures, which we call the "topological Hall torque (THT)". The THT emerges in bulk crystals without any interface or surface structures. We numerically demonstrate the enhancement of the THT in comparison with the conventional spin-transfer torque in the bulk metallic ferromagnet, which accounts for the giant current-induced torque measured in ferromagnetic $mathrm{SrRuO_3}$ .

Journal Articles

Chiral-spin rotation of non-collinear antiferromagnet by spin-orbit torque

Takeuchi, Yutaro*; Yamane, Yuta*; Yoon, J.-Y.*; Ito, Ryuichi*; Jinnai, Butsurin*; Kanai, Shun*; Ieda, Junichi; Fukami, Shunsuke*; Ohno, Hideo*

Nature Materials, 20(10), p.1364 - 1370, 2021/10

https://doi.org/10.1038/s41563-021-01005-3

Times Cited Count：81 Percentile：98.79(Chemistry, Physical)

Journal Articles

Correlation of anomalous Hall effect with structural parameters and magnetic ordering in Mn $_{3+x}$ Sn $_{1-x}$ thin films

Yoon, J.-Y.*; Takeuchi, Yutaro*; DuttaGupta, S.*; Yamane, Yuta*; Kanai, Shun*; Ieda, Junichi; Ohno, Hideo*; Fukami, Shunsuke*

AIP Advances (Internet), 11(6), p.065318_1 - 065318_6, 2021/06

https://doi.org/10.1063/5.0043192

Times Cited Count：14 Percentile：79.58(Nanoscience & Nanotechnology)

Journal Articles

Long-range spin transport on the surface of topological Dirac semimetal

Araki, Yasufumi; Misawa, Takahiro*; Nomura, Kentaro*

Physical Review Research (Internet), 3(2), p.023219_1 - 023219_15, 2021/06

https://doi.org/10.1103/PhysRevResearch.3.023219

We theoretically propose the long-range spin transport mediated by the gapless surface states of topological Dirac semimetal (TDSM). Low-dissipation spin current is a building block of next-generation spintronics devices. While conduction electrons in metals and spin waves in ferromagnetic insulators (FMIs) are the major carriers of spin current, their propagation length is inevitably limited due to the Joule heating or the Gilbert damping. In order to suppress dissipation and realize long-range spin transport, we here make use of the spin-helical surface states of TDSMs, such as CdAs and NaBi, which are robust against disorder. Based on a junction of two FMIs connected by a TDSM, we demonstrate that the magnetization dynamics in one FMI induces a spin current on the TDSM surface flowing to the other FMI. By both the analytical transport theory on the surface and the numerical simulation of real-time evolution in the bulk, we find that the induced spin current takes a universal semi-quantized value that is insensitive to the microscopic coupling structure between the FMI and the TDSM. We show that this surface spin current is robust against disorder over a long range, which indicates that the TDSM surface serves as a promising system for realizing spintronics devices.

Journal Articles

Dynamical spin-to-charge conversion on the edge of quantum spin Hall insulator

Araki, Yasufumi; Misawa, Takahiro*; Nomura, Kentaro*

Physical Review Research (Internet), 2(2), p.023195_1 - 023195_11, 2020/05

https://doi.org/10.1103/PhysRevResearch.2.023195

Journal Articles

Postgrowth annealing on defects in ZnO studied by positron annihilation, X-ray diffraction, rutherford backscattering, cathodoluminescence and hall measurements

Chen, Z. Q.; Yamamoto, Shunya; Maekawa, Masaki; Kawasuso, Atsuo; Yuan, X. L.*; Sekiguchi, Takashi*

Journal of Applied Physics, 94(8), p.4807 - 4812, 2003/10

https://doi.org/10.1063/1.1609050

Times Cited Count：168 Percentile：96.67(Physics, Applied)

no abstracts in English

Journal Articles

Magnetic and electrical properties of UIr

Yamamoto, Etsuji; Haga, Yoshinori; Matsuda, Tatsuma; Nakamura, Akio; Settai, Rikio*; Inada, Yoshihiko*; Sugawara, Hitoshi*; Sato, Hideyuki*; Onuki, Yoshichika

Journal of Nuclear Science and Technology, 39(Suppl.3), p.187 - 190, 2002/11

http://www.tandfonline.com/doi/abs/10.1080/00223131.2002.10875440

We succeeded in growing a high-quality single crystal of UIr with the monoclinic PbBi-type structure by the Czochralski pulling method in a tetra-arc furnace. The magnetization measurement indicates that UIr is an Ising-like ferromagnet with the Curie temperature $T_{rm C}$ = 46 K. The magnetic moment is found to be oriented along the [1 0 $=1] direction in the (010) plane. The saturated moment is 0.5 $mu_{rm B}$$ /U. The magnetic property, reflected in the magnetic susceptibility, electrical resistivity, Hall coefficient and thermoelectric power, is highly anisotropic. We also observed the de Haas-van Alphen (dHvA) oscillation. All the detected branches have large cyclotron effective masses ranging from 9.6 to 32 . They are consistent with the electronic specific heat coefficient =49 mJ/Kmol.

Journal Articles

Magnetic structure and the hall resistivity of Cu $_{1-x}$ Zn $_{x}$ Cr $_{2}$ Se $_{4}$

Iikubo, Satoshi*; Yasui, Yukio*; Oda, Keisuke*; Ono, Yohei*; Kobayashi, Yoshiaki*; Sato, Masatoshi*; Kakurai, Kazuhisa

Journal of the Physical Society of Japan, 71(11), p.2792 - 2799, 2002/11

https://doi.org/10.1143/JPSJ.71.2792

Times Cited Count：11 Percentile：56.91(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Behavior of compact toroid injected into an external magnetic field

Nagata, M.*; Fukumoto, Naoyuki*; Ogawa, Hiroaki; Ogawa, Toshihide; Uehara, Kazuya; Niimi, Hironobu*; Shibata, Takatoshi; Suzuki, Yoshio; Miura, Yukitoshi; Kayukawa, Naoyuki*; et al.

Nuclear Fusion, 41(11), p.1687 - 1694, 2001/11

https://doi.org/10.1088/0029-5515/41/11/318

Times Cited Count：12 Percentile：38.18(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles