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Report No.
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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; Ieda, Junichi   ; Okayasu, Satoru  ; Hioki, Tomosato*; Kikkawa, Takashi*; Saito, Eiji

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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