講演情報
[23p-A201-7]Impact of carbon on anomalous Hall conductivity in antiferromagnetic CoMn thin films for efficient current-induced magnetization switching
〇Shinji Isogami1, Yohei Kota2, Hideyuki Yasufuku1, Keiji Oyoshi1, Masahiko Tanaka1, Yukiko Takahashi1 (1.NIMS, 2.KOSEN Fukushima Col.)
キーワード：
transition metal carbides、Anomalous Hall effect、Current-induced magnetization switching
Carbon was embedded in the host 16-nm-thick CoMn antiferromagnetic films, via vacuum carburization process with Ar and C2H2 gas mixture under the annealing temperature of 500°C. Possible crystal structure revealed by x-ray diffraction suggests the L10-like structure with the carbon at body-centered site. It was revealed that the magnetic easy-axis lies on the film plane, and the magnitude of AHE enhanced drastically by carbon. Conversely, the film without carbon shows remarkably small value; therefore, carbon would be a booster of AHE. The enhanced saturation magnetization and negative AMR effects including fine crystal structures will be shown at the conference.