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Identifying the octupole antiferromagnetic domain orientation in Mn3NiN by scanning anomalous Nernst effect microscopy

Johnson, F. ; Kimák, J. ; Zemen, J. ; Šobáň, Z. ; Schmoranzerová, E. ; Godinho, J. ; Němec, P. ; Beckert, S. ; Reichlová, H. ; Boldrin, D. ; Wunderlich, J. ; Cohen, L. F.


The intrinsic anomalous Nernst effect in a magnetic material is governed by the Berry curvature at the Fermi energy and can be realized in non-collinear antiferromagnets with vanishing magnetization. Thin films of (001)-oriented Mn3NiN have their chiral antiferromagnetic structure located in the (111) plane facilitating the anomalous Nernst effect unusually in two orthogonal in-plane directions. ...


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