论文标题
通过DC和AC检测技术获得的三端YIG/PT纳米结构中木氧化传输实验的定量比较
Quantitative comparison of magnon transport experiments in three-terminal YIG/Pt nanostructures acquired via dc and ac detection techniques
论文作者
论文摘要
纯自旋电流的全电动产生和检测是控制磁性绝缘体中扩散磁通传输的一种有希望的方法。我们定量比较了两个测量方案，这些方案允许基于Yttrium Iron Garnet薄膜在三端装置中测量镁自旋传输。我们证明了基于当前反转技术的直流电荷电流方法以及使用第一和第二谐波锁定检测的AC电荷电流方法都可以有效地区分电气和热注射的镁。此外，这两种测量方案都允许研究通过施加到中心调制器带上的额外的直流电荷电流引起的镁转运的调节。但是，虽然在低调制器电荷电流电流下两种方案都会产生相同的结果，但我们发现明显的差异高于一定阈值电流。该差异源于调制器电流对磁通电导的非线性效应。
All-electrical generation and detection of pure spin currents is a promising way towards controlling the diffusive magnon transport in magnetically ordered insulators. We quantitatively compare two measurement schemes, which allow to measure the magnon spin transport in a three-terminal device based on a yttrium iron garnet thin film. We demonstrate that the dc charge current method based on the current reversal technique and the ac charge current method utilizing first and second harmonic lock-in detection can both efficiently distinguish between electrically and thermally injected magnons. In addition, both measurement schemes allow to investigate the modulation of magnon transport induced by an additional dc charge current applied to the center modulator strip. However, while at low modulator charge current both schemes yield identical results, we find clear differences above a certain threshold current. This difference originates from nonlinear effects of the modulator current on the magnon conductance.
