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Journal Articles

Switching of magnon parametric oscillation by magnetic field direction

Horibe, Sohei*; Shimizu, Hiroki*; Hoshi, Kojiro*; Makiuchi, Takahiko*; Hioki, Tomosato*; Saito, Eiji

Applied Physics Express, 16(7), p.073001_1 - 073001_4, 2023/07

Journal Articles

Magnetic hysteresis induction with nanocolumnar defects in magnetic insulators

Harii, Kazuya*; Umeda, Maki; Arisawa, Hiroki*; Hioki, Tomosato*; Sato, Nana; Okayasu, Satoru; Ieda, Junichi

Journal of the Physical Society of Japan, 92(7), p.073701_1 - 073701_4, 2023/07

 Times Cited Count:0 Percentile:65.86(Physics, Multidisciplinary)

Journal Articles

Spin motive force induced by parametric excitation

Hoshi, Kojiro*; Hioki, Tomosato*; Saito, Eiji

Applied Physics Letters, 121(21), p.212404_1 - 212404_6, 2022/11

Journal Articles

Hard X-ray photoelectron spectroscopy study of Pt/Y$$_{3}$$Fe$$_{5}$$O$$_{12}$$

Kobata, Masaaki; Yoshii, Kenji; Fukuda, Tatsuo; Kawasaki, Ikuto; Okane, Tetsuo; Yamagami, Hiroshi; Yaita, Tsuyoshi; Harii, Kazuya; Ieda, Junichi; Okayasu, Satoru; et al.

JPS Conference Proceedings (Internet), 30, p.011192_1 - 011192_6, 2020/03

High energy X-ray photoelectron spectroscopy (HAXPES) measurements were carried out for the Spin Seebeck system Pt/Y$$_{3}$$Fe$$_{5}$$O$$_{12}$$(YIG). This system was found to show anomalous Hall effect, possible due to the formation of intermetallic compounds between Fe$$^{3+}$$ and Pt. To reveal this possibility, we have measured the Fe 1s photoelectron peaks by using HAXPES. It was found that the Fe ions consist of Fe$$^{3+}$$ in YIG and metallic Fe. The formation of the metallic state is consistent with the proposed origin of the anomalous Hall effect. Other spectra such as Pt 4f will be presented at the conference.

Journal Articles

Magnon polarons in the spin Peltier effect

Yahiro, Reimei*; Kikkawa, Takashi*; Ramos, R.*; Oyanagi, Koichi*; Hioki, Tomosato*; Daimon, Shunsuke*; Saito, Eiji

Physical Review B, 101(2), p.024407_1 - 024407_7, 2020/01

 Times Cited Count:18 Percentile:78.55(Materials Science, Multidisciplinary)

Journal Articles

Room temperature and low-field resonant enhancement of spin Seebeck effect in partially compensated magnets

Ramos, R.*; Hioki, Tomosato*; Hashimoto, Yusuke*; Kikkawa, Takashi*; Frey, P.*; Kreil, A. J. E.*; Vasyuchka, V. I.*; Serga, A. A.*; Hillebrands, B.*; Saito, Eiji

Nature Communications (Internet), 10, p.5162_1 - 5162_8, 2019/11

 Times Cited Count:21 Percentile:77.31(Multidisciplinary Sciences)

Journal Articles

Time-resolved imaging of magnetoelastic waves by the cotton-mouton effect

Hioki, Tomosato*; Hashimoto, Yusuke*; Johansen, T. H.*; Saito, Eiji

Physical Review Applied (Internet), 11(6), p.061007_1 - 061007_5, 2019/06

 Times Cited Count:7 Percentile:38.09(Physics, Applied)

Journal Articles

Thermographic measurements of the spin Peltier effect in metal/yttrium-iron-garnet junction systems

Daimon, Shunsuke*; Uchida, Kenichi*; Iguchi, Ryo*; Hioki, Tomosato*; Saito, Eiji

Physical Review B, 96(2), p.024424_1 - 024424_12, 2017/07

 Times Cited Count:34 Percentile:82.44(Materials Science, Multidisciplinary)

Journal Articles

Time-resolved study of field-induced suppression of longitudinal spin Seebeck effect

Hioki, Tomosato*; Iguchi, Ryo*; Qiu, Z.*; Hou, D.*; Uchida, Kenichi*; Saito, Eiji

Applied Physics Express, 10(7), p.073002_1 - 073002_4, 2017/06

 Times Cited Count:13 Percentile:56.32(Physics, Applied)

Journal Articles

Thermal imaging of spin Peltier effect

Daimon, Shunsuke*; Iguchi, Ryo*; Hioki, Tomosato*; Saito, Eiji; Uchida, Kenichi*

Nature Communications (Internet), 7, p.13754_1 - 13754_7, 2016/12

 Times Cited Count:97 Percentile:95.46(Multidisciplinary Sciences)

Oral presentation

Interfacial analysis of high-energy X-ray photoelectron spectroscopy of Pt/YIG thin film showing spin Seebeck effect

Kobata, Masaaki; Yoshii, Kenji; Fukuda, Tatsuo; Kawasaki, Ikuto; Okane, Tetsuo; Harii, Kazuya; Ieda, Junichi; Hioki, Tomosato*; Saito, Eiji

no journal, , 

We have performed high-energy X-ray photoemission spectroscopic measurements of Pt/Y$$_{3}$$Fe$$_{5}$$O$$_{12}$$ (YIG) thin film showing spin Seebeck effect. This system shows intriguing properties such as anomalous Hall effect. To reveal the origin of this behavior, photoelectron spectra were taken using synchrotron radiation at the BL22XU beamline of SPring-8. It was found that the Fe 1s photoelectron peak was split into two peaks; the one arises from YIG, while the other from intermetallic compound between Fe and Pt. This result is consistent with the proposed mechanism of anomalous Hall effect. The other results will be presented at the conference.

Oral presentation

HAXPES study of spin Seebeck system Pt/Y$$_{3}$$Fe$$_{5}$$O$$_{12}$$

Kobata, Masaaki; Yoshii, Kenji; Fukuda, Tatsuo; Kawasaki, Ikuto; Okane, Tetsuo; Yamagami, Hiroshi; Yaita, Tsuyoshi; Harii, Kazuya; Ieda, Junichi; Okayasu, Satoru; et al.

no journal, , 

We have conducted high energy X-ray photoelectron spectroscopy (HAXPES) measurements on spin Seebeck system Pt/Y$$_{3}$$Fe$$_{5}$$O$$_{12}$$(YIG) using synchrotron radiation at BL22XU of SPring-8. It was found that the Fe$$^{3+}$$ ions are partially converted to a metallic Fe$$^{0}$$ state, a finding being consistent with the proposed mechanism of characteristic behavior such as anomalous Hall effect. We have also observed that two or more valence states of Fe ions in samples with low electric power generations, showing an inhomogeneous nature of the system. The other spectra such as O 1s and Pt 4f will be presented at the conference,

Oral presentation

Hard X-ray photoelectron spectroscopy study of radiation effects of Pt/Y$$_{3}$$Fe$$_{5}$$O$$_{12}$$

Kobata, Masaaki; Yoshii, Kenji; Fukuda, Tatsuo; Kawasaki, Ikuto; Satou, Yukihiko; Tanida, Hajime; Okane, Tetsuo; Yamagami, Hiroshi; Yaita, Tsuyoshi; Harii, Kazuya; et al.

no journal, , 

We have investigated the electronic structures of Pt/Y$$_{3}$$Fe$$_{5}$$O$$_{12}$$ thin films irradiated by gamma ray and heavy particles. Investigating details of this system is interesting from a possible application of waste heat recovery using the spin Seebeck effect (SSE) due to a tolerance against a presence of atomic defect. Irradiation of $$^{60}$$Co gamma ray does not affect the spectral profiles such as Fe 2$it{p}$, a fact being consistent with the gamma-ray tolerance of SSE as reported previously. On the other hand, the irradiation of Au particles was found to lead to a chemical shift of some photoelectron peaks, suggesting a possible defect of some ions such as Fe$$^{3+}$$.

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