二次元ファンデルワールス反強磁性体におけるスピンダイナミクスの電気的検出

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During the 2022 fiscal year, the applicant has continued the research on the anomalous Hall and magnetoresistance effect of Ag2CrO2. Varying the thickness of Ag2CrO2 has led to a strong dependence of the anomalous Hall effect and linear magnetoresistance of the material, indicating a large change in the magnetic properties of the material with respect to thickness and the quality of the samples. Currently, further experiments are being performed to investigate the origin of such a behavior, such as extrinsic scattering effects due to fluctuations of spins or the spin structure of the frustrated spin system. Spin transport devices of Ag2CrO2 has also been fabricated in order to investigate the effect of frustrated spins on the spin current. Although some successful devices were measured, further trial is required to accurately evaluate the spin Hall effect in Ag2CrO2. Furthermore, the applicant has started to perform electrical and spin transport measurements on PdNi, a related frustrated material, in order to compare its electrical and spin transport behavior to Ag2CrO2. Further experiment is being performed to understand the relation between the spin current and frustrated spin systems.