Origin of spin reorientation transitions in antiferromagnetic MnPt-based alloys

Abstract

Antiferromagnetic MnPt exhibits a spin reorientation transition (SRT) as a function of temperature, and off-stoichiometric Mn-Pt alloys also display SRTs as a function of concentration. The magnetocrystalline anisotropy in these alloys is studied using first-principles calculations based on the coherent potential approximation and the disordered local moment method. The anisotropy is fairly small and sensitive to the variations in composition and temperature due to the cancellation of large contributions from different parts of the Brillouin zone. Concentration and temperature-driven SRTs are found in reasonable agreement with experimental data. Contributions from specific band-structure features are identified and used to explain the origin of the SRTs.

arXiv comment6 pages, 8 figures

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Cited by in corpus (4)

• Voltage-controlled magnetic anisotropy in antiferromagnetic MgO-capped MnPt films
• Damping and Anti-Damping Phenomena in Metallic Antiferromagnets: An ab-initio Study
• Phonon, Electron, and Magnon Excitations in Antiferromagnetic L1${}_0$-type MnPt
• Perpendicular magnetic anisotropy in bulk and thin-film CuMnAs for antiferromagnetic memory applications