[15p-P07-1~60] 10 Spintronics and Magnetics (Poster)

English Presentation

[15p-P07-46] Mapping in-plane magnetization in Co thin film using laser-induced anomalous Nernst effect

〇Soichiro Mochizuki¹, Itaru Sugiura², Teruo Ono², Takuya Satoh¹, Kihiro Yamada¹ (1.Science Tokyo, 2.ICR, Kyoto Univ.)

Keywords:

spintronics,spin caloritronics,anomalous Nernst effect

The anomalous Nernst effect (ANE) generates the electromotive force in the direction of a cross-product of magnetization and temperature gradient. The ANE can be studied using not only homogeneous temperature gradients formed by heaters but also localized temperature gradients generated by laser irradiations. Because a large localized temperature gradient can be created via the laser irradiation method, we can obtain information on the in-plane magnetization component in the transverse direction of a magnetic wire. However, a complete determination of the in-plane magnetization vector requires simultaneously detecting the ANE voltages in two orthogonal directions in the film plane.
Here, we report a vector imaging of the in-plane magnetization in a Co thin film using the laser-induced ANE. As a result, we succeeded in visualizing the magnetization directions in the magnetic domains. In the presentation, we would like to show experimental details and discuss the results.