Imaging and writing magnetic domains in the non-collinear antiferromagnet Mn<sub>3</sub>Sn.
basic_science · Level V
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- Record sourced from PubMed, PMID 31784509.
- Also identified by DOI 10.1038/s41467-019-13391-z and PMC identifier 6884521.
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Abstract
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-Mn<sub>3</sub>Sn. 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.