论文标题
抗铁磁CR2O3中磁蛋白自旋电流的电压控制
Voltage control of magnon spin currents in antiferromagnetic Cr2O3
论文作者
论文摘要
使用自旋的自由度的电压控制的自旋设备对于将来的应用是可取的，并且可以允许节能信息处理。纯自旋电流可以通过磁性系统中的热激发来通过自旋Seebeck效果（SSE）产生。但是，仅通过电气控制这种自旋电流是一个基本挑战。在这里，我们研究了抗铁磁绝缘子CR2O3中SSE的电压控制。我们证明，由于SSE对磁性转子的方向的敏感性以及在CR2O3中的磁性耦合的存在，因此可以通过施加偏置电压来有效控制该材料中产生的SSE响应。使用基于CR2O3中磁电效应的模型来解释我们的实验结果。
Voltage-controlled spintronic devices utilizing the spin degree of freedom are desirable for future applications, and may allow energy-efficient information processing. Pure spin current can be created by thermal excitations in magnetic systems via the spin Seebeck effect (SSE). However, controlling such spin currents, only by electrical means, has been a fundamental challenge. Here, we investigate voltage control of the SSE in the antiferromagnetic insulator Cr2O3. We demonstrate that the SSE response generated in this material can be effectively controlled by applying a bias voltage, owing to the sensitivity of the SSE to the orientation of the magnetic sublattices as well as the existence of magnetoelectric couplings in Cr2O3. Our experimental results are explained using a model based on the magnetoelectric effect in Cr2O3.
