Imaging and writing magnetic domains in the non-collinear antiferromagnet Mn3Sn

Helena Reichlova (), Tomas Janda, Joao Godinho, Anastasios Markou, Dominik Kriegner, Richard Schlitz, Jakub Zelezny, Zbynek Soban, Mauricio Bejarano, Helmut Schultheiss, Petr Nemec, Tomas Jungwirth, Claudia Felser, Joerg Wunderlich and Sebastian T. B. Goennenwein
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Helena Reichlova: Technische Universität Dresden
Tomas Janda: Charles University
Joao Godinho: Charles University
Anastasios Markou: Max Planck Institute for Chemical Physics of Solids
Dominik Kriegner: Institute of Physics, Czech Academy of Sciences
Richard Schlitz: Technische Universität Dresden
Jakub Zelezny: Institute of Physics, Czech Academy of Sciences
Zbynek Soban: Institute of Physics, Czech Academy of Sciences
Mauricio Bejarano: Institute of Ion Beam Physics and Materials Research
Helmut Schultheiss: Institute of Ion Beam Physics and Materials Research
Petr Nemec: Charles University
Tomas Jungwirth: Institute of Physics, Czech Academy of Sciences
Claudia Felser: Max Planck Institute for Chemical Physics of Solids
Joerg Wunderlich: Institute of Physics, Czech Academy of Sciences
Sebastian T. B. Goennenwein: Technische Universität Dresden

Nature Communications, 2019, vol. 10, issue 1, 1-6

Abstract: 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—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.

Date: 2019
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DOI: 10.1038/s41467-019-13391-z

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