講演情報
[9a-N303-7]Fabrication and Characterization of Co-Pt Multilayer Nanowires Prepared
by Dual-bath Electrodeposition
〇(M2)Rio Kawana1, Natsuko Oguchi1, Daiki Oshima2, Michiyuki Yoshida1, Takashi Sugiura1, Mikiko Saito3, Takayuki Homma3, Takeshi Kato2, Teruo Ono4, Mutsuhiro Shima1, Keisuke Yamada1 (1.Gifu Univ., 2.Nagoya Univ., 3.Waseda Univ., 4.Kyoto Univ.)
キーワード：
nanowire、magnetics
A novel three-dimensional magnetic memory device utilizing domain wall (DW) motion has attracted attention for its potential in high-speed, high-density, and low-cost data storage. This memory uses magnetic nanowires composed of DW-pinning and domain layers, where data is transferred by driving DWs via electric current. Co–Pt alloys, whose magnetic properties depend on composition, are promising materials. Theoretical studies suggest that using Co–Pt layers with different compositions enables current-driven DW motion. In this study, multilayered Co–Pt nanowires consisting of Co-rich and Pt-rich layers were fabricated using a dual-bath electrodeposition method. The nanowires were grown in polycarbonate templates with layer thicknesses from 3 to 500 nm and total lengths around 10 μm. Structural and magnetic properties were analyzed via XRD, SEM-EDX, TEM, VSM, and MR measurements. Results confirmed alternating Co71Pt29 and Co13Pt87 layers with FCC structure. The magnetoresistance ratio increased as layer thickness decreased, indicating their potential for 3D magnetic memory applications.