We present the results of an experiment to locally resolve the spin Seebeck effect in a high-quality yttrium iron garnet–Pt sample. We achieve this by using a locally heated scanning thermal probe to generate a highly local nonequilibrium spin current. To support our experimental results, we also present a model based on the nonequilibrium thermodynamic approach that is in a good agreement with the experimental findings. To further corroborate our results, we index the locally resolved spin Seebeck effect with that of the local magnetization texture by magnetic force microscopy and correlate corresponding regions. We hypothesize that this technique allows imaging of magnetization textures within the magnon diffusion length and hence characterization of spin-caloritronic materials at the nanoscale.

中文翻译：

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使用扫描热探针的局部自旋塞贝克成像

我们提出了在高质量的钇铁石榴石-Pt样品中局部解决自旋塞贝克效应的实验结果。我们通过使用局部加热的扫描热探针来生成高度局部的非平衡自旋电流来实现此目的。为了支持我们的实验结果，我们还提出了一种基于非平衡热力学方法的模型，该模型与实验结果非常吻合。为了进一步证实我们的结果，我们通过磁力显微镜将局部分辨的自旋塞贝克效应与局部磁化织构的索引，并关联了相应区域。我们假设该技术允许在磁振子扩散长度内成像磁化纹理，从而表征纳米级自旋量热电子材料。