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Spin Hall magnetoresistance in antiferromagnet/heavy-metal heterostructures

Spin Hall magnetoresistance in antiferromagnet/heavy-metal heterostructures

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FISCHER, Johanna, Olena GOMONAY, Richard SCHLITZ, Kathrin GANZHORN, Nynke VLIETSTRA, Matthias ALTHAMMER, Hans HUEBL, Matthias OPEL, Sebastian T. B. GÖNNENWEIN, Stephan GEPRÄGS, 2018. Spin Hall magnetoresistance in antiferromagnet/heavy-metal heterostructures. In: Physical Review B. American Physical Society (APS). 97(1), 014417. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.97.014417

@article{Fischer2018magne-51892, title={Spin Hall magnetoresistance in antiferromagnet/heavy-metal heterostructures}, year={2018}, doi={10.1103/PhysRevB.97.014417}, number={1}, volume={97}, issn={2469-9950}, journal={Physical Review B}, author={Fischer, Johanna and Gomonay, Olena and Schlitz, Richard and Ganzhorn, Kathrin and Vlietstra, Nynke and Althammer, Matthias and Huebl, Hans and Opel, Matthias and Gönnenwein, Sebastian T. B. and Geprägs, Stephan}, note={Article Number: 014417} }

We investigate the spin Hall magnetoresistance in thin-film bilayer heterostructures of the heavy metal Pt and the antiferromagnetic insulator NiO. While rotating an external magnetic field in the easy plane of NiO, we record the longitudinal and the transverse resistivity of the Pt layer and observe an amplitude modulation consistent with the spin Hall magnetoresistance. In comparison to Pt on collinear ferrimagnets, the modulation is phase shifted by 90<sup>∘</sup> and its amplitude strongly increases with the magnitude of the magnetic field. We explain the observed magnetic field dependence of the spin Hall magnetoresistance in a comprehensive model taking into account magnetic-field-induced modifications of the domain structure in antiferromagnets. With this generic model, we are further able to estimate the strength of the magnetoelastic coupling in antiferromagnets. Our detailed study shows that the spin Hall magnetoresistance is a versatile tool to investigate the magnetic spin structure as well as magnetoelastic effects, even in antiferromagnetic multidomain materials. Schlitz, Richard 2018 Opel, Matthias 2020-11-19T14:29:28Z Spin Hall magnetoresistance in antiferromagnet/heavy-metal heterostructures Gomonay, Olena Huebl, Hans Geprägs, Stephan Gönnenwein, Sebastian T. B. Opel, Matthias Gomonay, Olena Fischer, Johanna Vlietstra, Nynke eng Vlietstra, Nynke Gönnenwein, Sebastian T. B. Althammer, Matthias Geprägs, Stephan Ganzhorn, Kathrin Althammer, Matthias terms-of-use Ganzhorn, Kathrin Fischer, Johanna Huebl, Hans Schlitz, Richard 2020-11-19T14:29:28Z

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