Anomalous Hall and Nernst effects in ferrimagnetic Mn<sub>4</sub>N films: Possible interpretations and prospects for enhancement

نویسندگان

چکیده

Ferrimagnetic Mn4N is a promising material for heat flux sensors, based on the anomalous Nernst effect (ANE), because of its sizeable uniaxial magnetic anisotropy (Ku) and low saturation magnetization (Ms). We experimentally theoretically investigated ANE Hall in sputter-deposited films. It was revealed that observed negative conductivity (?xy) could be explained by two different coexisting structures, is, dominant structure with high Ku, contaminated another negligible owing to an imperfect degree order N. The transverse thermoelectric power (SANE) +0.5 ?V/K at 300 K yielded coefficient (?xy) +0.34 A/(m · K), which smaller than value predicted from first-principles calculation. interpretation ?xy calculations led us conclude realization single Ku optimal adjustment Fermi level are approaches enhance SANE through sign reversal ?xy enlargement up theoretical 1.77 K).

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ژورنال

عنوان ژورنال: Applied Physics Letters

سال: 2021

ISSN: ['1520-8842', '0003-6951', '1077-3118']

DOI: https://doi.org/10.1063/5.0039569