Magnetic order of Dy${}^{3+}$ and Fe${}^{3+}$ moments in antiferromagnetic DyFeO${}_3$ probed by spin Hall magnetoresistance and spin Seebeck effect

Abstract

We report on spin Hall magnetoresistance (SMR) and spin Seebeck effect (SSE) in single crystal of the rare-earth antiferromagnet DyFeO${}_3$ with a thin Pt film contact. The angular shape and symmetry of the SMR at elevated temperatures reflect the antiferromagnetic order of the Fe${}^{3+}$ moments as governed by the Zeeman energy, the magnetocrystalline anisotropy and the Dzyaloshinskii-Moriya interaction. We interpret the observed linear dependence of the signal on the magnetic field strength as evidence for field-induced order of the Dy${}^{3+}$ moments up to room temperature. At and below the Morin temperature of 50K, the SMR monitors the spin-reorientation phase transition of Fe${}^{3+}$ spins. Below 23K, additional features emerge that persist below 4K, the ordering temperature of the Dy${}^{3+}$ magnetic sublattice. We conclude that the combination of SMR and SSE is a simple and efficient tool to study spin reorientation phase transitions and sublattice magnetizations.

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• Coexisting magnetic structures and spin-reorientation in Er${}_{0.5}$Dy${}_{0.5}$FeO${}_3$: Bulk magnetization, neutron scattering, specific heat, and \emph{Ab-initio} studies
• Simple Realistic Model of Spin Reorientation in 4f-3d Compounds
• Probing magnetic anisotropy and spin-reorientation transition in 3D antiferromagnet, Ho${}_{0.5}$Dy${}_{0.5}$FeO${}_3|$Pt using spin Hall magnetoresistance