Imaging and writing magnetic domains in the non-collinear antiferromagnet Mn3Sn.,Nature Communications

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Imaging and writing magnetic domains in the non-collinear antiferromagnet Mn3Sn.
Nature Communications ( IF 14.7 ) Pub Date : 2019-11-29 , DOI: 10.1038/s41467-019-13391-z
Helena Reichlova ₁ , Tomas Janda ₂ , Joao Godinho _{2,

3} , Anastasios Markou ₄ , Dominik Kriegner _{3,

4} , Richard Schlitz ₁ , Jakub Zelezny ₃ , Zbynek Soban ₃ , Mauricio Bejarano ₅ , Helmut Schultheiss ₅ , Petr Nemec ₂ , Tomas Jungwirth _{3,

6} , Claudia Felser ₄ , Joerg Wunderlich _{3,

7} , Sebastian T B Goennenwein ₁

Affiliation

Non-collinear antiferromagnets are revealing many unexpected phenomena and they became crucial for the field of antiferromagnetic spintronics. To visualize and prepare a well-defined domain structure is of key importance. The spatial magnetic contrast, however, remains extraordinarily difficult to be observed experimentally. Here, we demonstrate a magnetic imaging technique based on a laser induced local thermal gradient combined with detection of the anomalous Nernst effect. We employ this method in one the most actively studied representatives of this class of materials-Mn3Sn. We demonstrate that the observed contrast is of magnetic origin. We further show an algorithm to prepare a well-defined domain pattern at room temperature based on heat assisted recording principle. Our study opens up a prospect to study spintronics phenomena in non-collinear antiferromagnets with spatial resolution.

中文翻译：

在非共线反铁磁体Mn3Sn中成像和写入磁畴。

非共线反铁磁体正在揭示许多意外现象，它们成为反铁磁自旋电子学领域的关键。可视化和准备定义良好的域结构至关重要。然而，通过实验仍然很难观察到空间磁对比度。在这里，我们演示了基于激光诱导的局部热梯度与异常能斯特效应检测相结合的磁成像技术。我们在此类材料中最活跃研究的代表-Mn3Sn中采用了这种方法。我们证明观察到的对比度是磁性起源的。我们进一步展示了一种基于热辅助记录原理在室温下准备明确定义的畴模式的算法。

更新日期：2019-11-30

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