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Journal Articles

Electric field effect on the magnetic domain wall creep velocity in Pt/Co/Pd structures with different Co thicknesses

Koyama, Tomohiro*; Ieda, Junichi; Chiba, Daichi*

Applied Physics Letters, 116(9), p.092405_1 - 092405_5, 2020/03

AA2019-0550.pdf:0.91MB

 Times Cited Count:1 Percentile:0(Physics, Applied)

Journal Articles

Electric field control of magnetic domain wall motion via modulation of the Dzyaloshinskii-Moriya interaction

Koyama, Tomohiro*; Nakatani, Yoshinobu*; Ieda, Junichi; Chiba, Daichi*

Science Advances (Internet), 4(12), p.eaav0265_1 - eaav0265_5, 2018/12

 Times Cited Count:26 Percentile:86.18(Multidisciplinary Sciences)

We show that the electric field (EF) can control the magnetic domain wall (DW) velocity in a Pt/Co/Pd asymmetric structure. With the application of a gate voltage, a significant change in DW velocity up to 50 m/s is observed, which is much greater than that observed in previous studies. Moreover, a DW velocity exceeding 100 m/s is clearly modulated. An EF-induced change in the interfacial Dzyaloshinskii-Moriya interaction (DMI) up to several percent is found to be the origin of the velocity modulation. The DMI-mediated velocity change shown here is a fundamentally different mechanism from that caused by EF-induced anisotropy modulation. Our results will pave the way for the electrical manipulation of spin structures and dynamics via DMI control, which can enhance the performance of spintronic devices.

Journal Articles

Small saturation moment due to the crystalline electric field effect for $$T_h$$ site symmetry in the ferromagnet UFe$$_4$$P$$_{12}$$

Matsuda, Tatsuma; Galatanu, A.; Haga, Yoshinori; Ikeda, Shugo; Yamamoto, Etsuji; Hedo, Masato*; Uwatoko, Yoshiya*; Takeuchi, Tetsuya*; Sugiyama, Kiyohiro*; Kindo, Koichi*; et al.

Journal of the Physical Society of Japan, 73(9), p.2533 - 2538, 2004/09

 Times Cited Count:8 Percentile:49.43(Physics, Multidisciplinary)

Electrical resistivity, specific heat, magnetic susceptibility and high-field magnetization measurements have been performed on the ferromagnet UFe$$_{4}$$P$$_{12}$$ with the cubic crystal structure. The ferromagnetic ordering at $$T_{rm C}$$,=,3.1 K, a small saturation moment of 1.3 $$mu_{rm B}$$/U, together with the temperature dependence of the magnetic susceptibility, are found to be well explained by considering the 5$$f^2$$ crystalline electric field schemes for $$T_{h}$$ site symmetry and the magnetic exchange interaction.

Journal Articles

Multichordal charge exchange recombination spectroscopy on the JT-60U tokamak

Koide, Yoshihiko; Sakasai, Akira; Sakamoto, Yoshiteru; Kubo, Hirotaka; Sugie, Tatsuo

Review of Scientific Instruments, 72(1), p.119 - 127, 2001/01

 Times Cited Count:37 Percentile:84.49(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Density peaking in the JFT-2M tokamak plasma with counter neutral-beam injection

*; Ito, Sanae*; Ito, Kimitaka; *; Miura, Yukitoshi; Kawashima, Hisato; Mori, Masahiro; Matsuda, Toshiaki; Suzuki, Norio; Tamai, Hiroshi; et al.

Physical Review Letters, 68(2), p.182 - 185, 1992/01

 Times Cited Count:49 Percentile:86.63(Physics, Multidisciplinary)

no abstracts in English

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