Identifying the octupole Antiferromagnetic domain orientation in Mn$_{3}$NiN by scanning Anomalous Nernst Effect microscopy
/ Authors
F. Johnson, J. Kim'ak, J. Zemen, Z. vSob'avn, E. Schmoranzerov'a, J. Godinho, P. Nvemec, S. Beckert, H. Reichlov'a, D. Boldrin
and 32 more authors
J. Wunderlich, L. Laboratory, I. College, Prince Consort Rd, London SW7 2AZ, United Kingdom., Faculty of Mathematics, Physics, Charles University, Prague, 16 121, Czech Republic, Faculty of Electrical Engineering, Czech Technical University, 2. Technicka, 27 Prague166, Czech Republic Department of Physics, C. A. O. Sciences, 18121, Czech Republic Institut fur Festkorper- und Materialphysik, T. U. Dresden, 01314 Dresden, Germany Supa, S. O. Physics, Astronomy, U. Glasgow, G12 8QQ, United Kingdom Institute of Experimental, A. Physics, U. Regensburg, 93040 Regensburg, H Germany
/ Abstract
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 Mn 3 NiN have their chiral antiferromagnetic structure located in the (111) plane facilitating the anomalous Nernst effect unusually in two orthogonal in-plane directions. The sign of each component of the anomalous Nernst effect is determined by the local antiferromagnetic domain state. In this work, a temperature gradient is induced in a 50 nm thick Mn 3 NiN two micron-size Hall cross by a focused scanning laser
DOI: 10.1063/5.0091257