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Horibe, Sohei*; Shimizu, Hiroki*; Hoshi, Kojiro*; Makiuchi, Takahiko*; Hioki, Tomosato*; Saito, Eiji
Applied Physics Express, 16(7), p.073001_1 - 073001_4, 2023/07
Times Cited Count：0 Percentile：0(Physics, Applied)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：1 Percentile：57.37(Physics, Multidisciplinary)Hoshi, Kojiro*; Hioki, Tomosato*; Saito, Eiji
Applied Physics Letters, 121(21), p.212404_1 - 212404_6, 2022/11
Times Cited Count：2 Percentile：32.25(Physics, Applied)
Fe
O
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/YFeO(YIG). This system was found to show anomalous Hall effect, possible due to the formation of intermetallic compounds between Fe
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 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.
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：20 Percentile：77.19(Materials Science, Multidisciplinary)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：24 Percentile：76.4(Multidisciplinary Sciences)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：36.99(Physics, Applied)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：35 Percentile：81.94(Materials Science, Multidisciplinary)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：14 Percentile：55.62(Physics, Applied)Daimon, Shunsuke*; Iguchi, Ryo*; Hioki, Tomosato*; Saito, Eiji; Uchida, Kenichi*
Nature Communications (Internet), 7, p.13754_1 - 13754_7, 2016/12
Times Cited Count：108 Percentile：95.62(Multidisciplinary Sciences)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/YFeO (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.
FeOKobata, 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/YFeO(YIG) using synchrotron radiation at BL22XU of SPring-8. It was found that the Fe ions are partially converted to a metallic Fe
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,
FeOKobata, 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/YFeO 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 
Co gamma ray does not affect the spectral profiles such as Fe 2
, 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.
