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Attempt to measure magnetic hyperfine fields in metallic thin wires under spin Hall conditions using synchrotron-radiation M$"o$ssbauer spectroscopy

放射光メスバウアー分光によるスピンホール条件下金属薄膜の内部磁場の測定

壬生 攻*; 三井 隆也; 田中 雅章*; 増田 亮*; 北尾 真司*; 小林 康浩*; 依田 芳卓*; 瀬戸 誠*

Mibu, Ko*; Mitsui, Takaya; Tanaka, Masaaki*; Masuda, Ryo*; Kitao, Shinji*; Kobayashi, Yasuhiro*; Yoda, Yoshitaka*; Seto, Makoto*

Measurement of the magnetic hyperfine fields in metallic thin wires under spin Hall conditions was attempted using the emerging technique synchrotron radiation M$"o$ssbauer spectroscopy. A M$"o$ssbauer probe layer of $$^{57}$$Fe(0.2 nm), $$^{57}$$Fe(0.6 nm), or $$^{119}$$Sn(0.6 nm) was embedded as an electron spin detector near the surfaces of V, Au, Pt, and $$^{56}$$Fe wires. The magnitudes of the magnetic hyperfine fields at the $$^{57}$$Fe and $$^{119}$$Sn nuclear sites that could be enhanced by nonequilibrium conduction electron spin polarization were measured both without and with the application of an electric current along the wire. Changes in the M$"o$ssbauer spectra were not clearly observed, indicating that the magnetic hyperfine field induced by nonequilibrium spin polarization is smaller than the detection limit at least for the measured systems and conditions.

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パーセンタイル:82.81

分野:Physics, Applied

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