Large spin Hall magnetoresistance in antiferromagnetic α-Fe2O3/Pt heterostructures

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.

arXiv comment10 pages, 9 figures, 61 (updated) references, including supplemental material

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Cited by in corpus (25)

• Long-distance spin-transport across the Morin phase transition up to room temperature in ultra-low damping single crystals of the antiferromagnet α-Fe2O3
• Antiferromagnetic magnon spintronic based on non-reciprocal and non-degenerated ultra-fast spin-waves in the canted antiferromagnet α-Fe2O3
• Spin Hall magnetoresistance in antiferromagnetic insulators
• Structural sensitivity of the spin Hall magnetoresistance in antiferromagnetic thin films
• Antiferromagnetic resonance in $\alpha$-Fe${}_2$O${}_3$ up to its Néel temperature
• Unidirectional Spin Hall Magnetoresistance in Antiferromagnetic Heterostructures
• Magnetic order of Dy${}^{3+}$ and Fe${}^{3+}$ moments in antiferromagnetic DyFeO${}_3$ probed by spin Hall magnetoresistance and spin Seebeck effect
• Third Harmonic Characterization of Antiferromagnetic Heterostructures
• Quantifying the spin mixing conductance of EuO/W heterostructures by spin Hall magnetoresistance experiments
• Role of substrate clamping on anisotropy and domain structure in the canted antiferromagnet $\alpha$-Fe${}_2$O${}_3$
• All-electrical Magnon Transport Experiments in Magnetically Ordered Insulators
• Magnon-mediated interlayer coupling in an all-antiferromagnetic junction
• Cavity-mediated coupling of antiferromagnetic spin waves
• Static magnetic proximity effects and spin Hall magnetoresistance in Pt/Y${}_3$Fe${}_5$O${}_{12}$ and inverted Y${}_3$Fe${}_5$O${}_{12}$/Pt bilayers
• Absence of Spin Hall Magnetoresistance in Pt/(CoNi)n multilayers
• A route towards stable homochiral topological textures in A-type antiferromagnets
• Insight into the structural and magnetotransport properties of epitaxial heterostructures $\alpha$-Fe${}_2$O${}_3$-Pt(111): Role of the reversed layer sequence
• Impact of magnetic anisotropy on the magnon Hanle effect in $\alpha$-Fe${}_2$O${}_3$
• Low Temperature Suppression of the Spin Nernst Angle in Pt
• Anisotropic Field Suppression of Morin Transition Temperature in Epitaxially Grown Hematite Thin Films
• Spin Hall magnetoresistance at the altermagnetic insulator/Pt interface
• Ground states and magnonics in orthogonally-coupled symmetric all-antiferromagnetic junctions
• Spin Hall Magnetoresistance in Antiferromagnetic Insulators
• Nonreciprocal Magnon Hanle Effect in Antiferromagnetic $\alpha$-Fe${}_2$O${}_3$
• Fast reversal of Néel vectors in antiferromagnets via domain-wall motion driven by vertically injected spin currents