论文标题
通过电流辅助域壁运动在Weyl Ferromagnet中的超高磁性调制
Ultra-efficient magnetism modulation in a Weyl ferromagnet by current-assisted domain wall motion
论文作者
论文摘要
灵活有效的磁性配置操纵可能具有挑战性。在实用设备的设计中，实现高效电流的高效磁场的需求紧迫。在这里，我们报告了一种独特的方法，可通过直接电流注入在磁性Weyl半分CO3SN2S2中进行有效的磁性调节。我们证明调制过程源于电流辅助域壁运动。通过两种独立的方法，我们揭示了CO3SN2S2的自旋转移扭矩效率高达2.4-5.6 KOE MA^（-1）CM^2，并且驱动磁性域壁的阈值电流密度低至<5.1*10*10^5 A/CM^2没有外部场，以及外部场，以及<1.5*10^5 a/cm^2^2^2^2^2。我们的发现表明了一种新的和强大的方法来进行亚微米磁性操纵，并为新的Spintronics范式打开了大门，结合了磁性，拓扑和金属性，用于低能消耗记忆和计算。
Flexible and efficient manipulation of magnetic configurations can be challenging. In the design of practical devices, achieving a high effective magnetic field with a low working current is under tight demand. Here, we report a unique method for efficient magnetism modulation by direct current injection in magnetic Weyl semimetal Co3Sn2S2. We demonstrate that the modulation process stems from current-assisted domain wall motion. Through two independent methods, we reveal that the spin-transfer torque efficiency of Co3Sn2S2 reaches as high as 2.4-5.6 kOe MA^(-1) cm^2, and the threshold current density for driving the magnetic domain walls is as low as <5.1*10^5 A/cm^2 without an external field, and <1.5*10^5 A/cm^2 with a moderate external field. Our findings manifest a new and powerful approach for sub-micron magnetism manipulation, and also open the door towards a new paradigm of spintronics that combines magnetism, topology, and metallicity for low-energy consumption memory and computing.
