Regensburg 2022 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 29: Caloric Effects in Magnetic Materials

MA 29.6: Vortrag

Donnerstag, 8. September 2022, 10:45–11:00, H47

Magneto-thermal transport in non-collinear antiferromagnetic thin films — •Sebastian Beckert¹, João Godinho^2,4, Freya Johnson³, Jozef Kimák⁴, Eva Schmoranzerová⁴, Zbyněk Šobáň², Kamil Olejník², Jan Zemen⁵, Joerg Wunderlich⁶, Petr Němec⁴, Dominik Kriegner^1,2, Lesley F. Cohen³, Andy Thomas^1,7, Sebastian T. B. Goennenwein⁸, and Helena Reichlová^1,2 — ¹TU Dresden — ²IoP ASCR Prague — ³Imperial College London — ⁴Charles University — ⁵Czech TU — ⁶University of Regensburg — ⁷IFW Dresden — ⁸University of Konstanz

Understanding the interplay between topological properties and transport phenomena in non-collinear antiferromagnets is important for exploiting their unconventional characteristics in spintronics. Non-collinear antiferromagnets can exhibit phenomena previously known to be exclusive to ferromagnets, such as the anomalous Hall Effect (AHE) or the anomalous Nernst effect (ANE).

We experimentally study magneto-thermal transport in a Mn₃NiN thin film antiferromagnet. In our films the spins are arranged in the (111) plane, resulting in a component of the Hall vector in both out-of plane and in-plane direction. This makes Mn₃NiN an ideal candidate for a systematic study of magneto-thermal transport phenomena. We will present measurements of ANE, AHE, magnetoresistance and magneto-Seebeck effect measured in a single device. We will compare the amplitudes of the magneto-thermal transport coefficients and discuss them in context of the Mott relation.