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Large Spin Hall Magnetoresistance in Antiferromagnetic α−Fe<sub>2</sub>O<sub>3</sub>/Pt Heterostructures

Large Spin Hall Magnetoresistance in Antiferromagnetic α−Fe2O3/Pt Heterostructures

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FISCHER, Johanna, Matthias ALTHAMMER, Nynke VLIETSTRA, Hans HUEBL, Sebastian T. B. GÖNNENWEIN, Rudolf GROSS, Stephan GEPRÄGS, Matthias OPEL, 2020. Large Spin Hall Magnetoresistance in Antiferromagnetic α−Fe2O3/Pt Heterostructures. In: Physical Review Applied. American Physical Society (APS). 13(1), 014019. eISSN 2331-7019. Available under: doi: 10.1103/PhysRevApplied.13.014019

@article{Fischer2020Large-51840, title={Large Spin Hall Magnetoresistance in Antiferromagnetic α−Fe2O3/Pt Heterostructures}, year={2020}, doi={10.1103/PhysRevApplied.13.014019}, number={1}, volume={13}, journal={Physical Review Applied}, author={Fischer, Johanna and Althammer, Matthias and Vlietstra, Nynke and Huebl, Hans and Gönnenwein, Sebastian T. B. and Gross, Rudolf and Geprägs, Stephan and Opel, Matthias}, note={Article Number: 014019} }

Gönnenwein, Sebastian T. B. Gross, Rudolf 2020 Geprägs, Stephan eng Geprägs, Stephan Gönnenwein, Sebastian T. B. We investigate the spin Hall magnetoresistance (SMR) at room temperature in thin film heterostructures of antiferromagnetic, insulating, (0001)-oriented alpha-Fe<sub>2</sub>O<sub>3</sub> (hematite) and Pt. We measure their longitudinal and transverse resistivities while rotating an applied magnetic field of up to 17T in three orthogonal planes. For out-of-plane magnetotransport measurements, we find indications for a multidomain antiferromagnetic configuration whenever the field is aligned along the film normal. For in-plane field rotations, we clearly observe a sinusoidal resistivity oscillation characteristic for the SMR due to a coherent rotation of the Neel vector. The maximum SMR amplitude of 0.25% is, surprisingly, twice as high as for prototypical ferrimagnetic Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub>/Pt heterostructures. The SMR effect saturates at much smaller magnetic fields than in comparable antiferromagnets, making the alpha-Fe<sub>2</sub>O<sub>3</sub>/Pt system particularly interesting for room-temperature antiferromagnetic spintronic applications. Huebl, Hans terms-of-use Althammer, Matthias Fischer, Johanna 2020-11-17T14:02:27Z Vlietstra, Nynke Large Spin Hall Magnetoresistance in Antiferromagnetic α−Fe<sub>2</sub>O<sub>3</sub>/Pt Heterostructures Opel, Matthias Vlietstra, Nynke Althammer, Matthias Fischer, Johanna Gross, Rudolf 2020-11-17T14:02:27Z Huebl, Hans Opel, Matthias

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