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Large spin Hall magnetoresistance in antiferromagnetic \alpha-Fe2O3/Pt heterostructures
- Source :
- Phys. Rev. Applied 13, 014019 (2020)
- Publication Year :
- 2019
-
Abstract
- We investigate the spin Hall magnetoresistance (SMR) at room temperature in thin film heterostructures of antiferromagnetic, insulating, (0001)-oriented alpha-Fe2O3 (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 Y3Fe5O12/Pt heterostructures. The SMR effect saturates at much smaller magnetic fields than in comparable antiferromagnets, making the alpha-Fe2O3/Pt system particularly interesting for room-temperature antiferromagnetic spintronic applications.<br />Comment: 10 pages, 9 figures, 61 (updated) references, including supplemental material
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Applied 13, 014019 (2020)
- Publication Type :
- Report
- Accession number :
- edsarx.1907.13393
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevApplied.13.014019