講演情報
[23a-12D-2]Optical detection of spin and orbital Hall currents in V and Pt
〇Yukihiro Marui1,2, Masashi Kawaguchi1, Satoshi Sumi3, Hiroyuki Awano3, Kohji Nakamura4, Masamitsu Hayashi1,5 (1.Univ. of Tokyo, 2.RIEC Tohoku Univ., 3.Toyota Tech. Inst., 4.Mie Univ., 5.TSQS Univ. of Tokyo)
キーワード：
spintronics、orbitronics、magneto-optical Kerr effect
Spintronics is a field that actively utilizes the spin degree of freedom of electrons in addition to its charge degree of freedom. Recently, the orbital Hall effect, a phenomenon that converts current to an orbital current, has gained attention due to its potential application in technologies. Although many of the experiments use the torque acting on the magnetization of a magnetic layer adjacent to a non-magnetic layer to probe the orbital current from the latter, it is difficult to assess the magnitude of the orbital current in a precise way. The magneto-optical Kerr effect (MOKE) has recently been reported to be an excellent detector to measure the spin and orbital accumulation in non-magnetic systems. Here, we use this technique to study the accumulation of spin and orbital moment at metal surface due to the spin and orbital Hall effects, respectively, in Pt and V, transition metals that possess strong and weak spin-orbit interaction.