交流电流驱动的磁化切换和非线性大厅校正在磁性拓绝缘体中
Yuto Kiyonaga1, Masataka Mogi1, Ryutaro Yoshimi2,3
1Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), The University of Tokyo, Tokyo, 113-8656, Japan.
Advanced materials (Deerfield Beach, Fla.)
|October 14, 2025
概括
交替电流激发有效地逆转磁化在磁性拓绝缘体. 这一过程产生了可调节的非线性响应,为先进的自旋电子设备铺平了道路.
科学领域:
- 这就是Spintronics.
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
背景情况:
- 拓绝缘器具有旋转轨道合的表面状态,可实现高效的旋转轨道扭矩.
- 电流诱导磁化控制对于下一代自旋电子设备至关重要.
研究的目的:
- 在半磁拓绝缘器中演示交流电 (AC) 驱动的磁化反转.
- 在交流激发下研究非线性反应和频率混合现象.
- 探索AC激发的潜力,用于多功能自旋电子应用.
主要方法:
- 使用了一种半磁拓绝缘体异构结构: (Cr,Bi,Sb) 2Te3/(Bi,Sb) 2Te3.3.
- 使用示波器进行时域霍尔电压测量.
- 应用福里埃分析到时间变化的霍尔电压信号.
- 在双频激发下研究了电流-电压特性.
主要成果:
- 在低值电流密度 (1.5 × 10^9 A m^-2) 的情况下实现了交流驱动磁化逆转.
- 在磁化逆转过程中观察到非线性和纠正的霍尔反应.
- 在霍尔电压中识别了高波信号和纠正的直流 (DC) 组件.
- 在双频激发下,通过歇斯底里电流电压特征证明了频率混合.
结论:
- 交流激发提供了一种有效的方法,用于磁性拓绝缘体中的磁化切换.
- 观察到的非线性响应和频率混合为自旋电子设备的功能提供了新的途径.
- 这项工作为能源效率高的旋转机内存,信号处理和频率转换设备提供了一条道路.
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