2023年第70回応用物理学会春季学術講演会

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一般セッション(口頭講演)

10 スピントロニクス・マグネティクス » 10.2 スピン基盤技術・萌芽的デバイス技術

[16p-D419-1~18] 10.2 スピン基盤技術・萌芽的デバイス技術

2023年3月16日(木) 13:30 〜 18:30 D419 (11号館)

山田 貴大(東工大)、周 偉男(物材機構)、山崎 匠(東北大)

14:15 〜 14:30

[16p-D419-4] Crystalline orientation dependence of spin current transmission in epitaxial NiO film probed by thermo-spin effects

〇(P)Takumi Yamazaki1、Takeshi Seki1,2、Takahide Kubota3、Koki Takanashi1,4 (1.IMR, Tohoku Univ.、2.NIMS、3.Tohoku Univ.、4.ASRC, JAEA)

キーワード:antiferromagnet, spin caloritronics, thermoreflectance

We investigate the effect of crystal orientation on the spin current transmission characteristics of NiO films grown epitaxially on MgO(111) and MgO(001) substrates. The thermo-spin effects in Pt/NiO/CoFeB trilayers are used as a probe to measure spin current transmission in NiO. The lock-in thermoreflectance method is used to detect temperature changes induced by the thermo-spin effects. The results show that both NiO(111) and NiO(001) samples have similar temperature amplitudes in the thin NiO region, indicating no significant orientation dependence in this region. The NiO thickness dependence of spin current transmission for both NiO(111) and NiO(001) exhibits a non-monotonic decay, which differs from previous studies of a simple exponential decay. We will provide more information in the presentation on the differences in the NiO thickness dependence of the temperature amplitudes for NiO(111) and NiO(001).