Sign reversal of anomalous Hall conductivity and magnetoresistance in cubic non-collinear antiferromagnet Mn${}_3$Pt thin films

Abstract

The two dimensional kagome spin lattice structure of Mn atoms in the family of Mn${}_3$X non-collinear antiferromagnets are providing substantial excitement in the exploration of Berry curvature physics and the associated non-trivial magnetotransport responses. Much of these studies are performed in the hexagonal systems, mainly Mn${}_3$Sn and Mn${}_3$Ge, with the kagome planes having their normal along the [001] direction. In this manuscript, we report our study in the cubic Mn${}_3$Pt thin films with their kagome planes normal to the [111] crystal axis. Our studies reveal a hole conduction dominant Hall response with a non-monotonic temperature dependence of anomalous Hall conductivity (AHC), increasing from 9 ${\Omega }^{-1}$cm${}^{-1}$ at room temperature to 29 ${\Omega }^{-1}$cm${}^{-1}$ at 100 K, followed by a drop and unexpected sign-reversal at lower temperatures. Similar sign reversal is also observed in magnetoresistance measurements. We attribute this sign reversal to the transition from a Berry curvature dominated AHC at high temperature to a weak canted ferromagnetic AHC response at lower temperature, below 70 K, caused by the reorientation of Mn moments out of the kagome plane. Our above results in thin films of Mn${}_3$Pt make advances in their integration with room temperature antiferromagnetic spintronics.

arXiv comment6 pages, 5 figures

References in corpus (23)

• Double-slit photoelectron interference in strong-field ionization of the neon dimer
• First Principles Calculation of Anomalous Hall Conductivity in Ferromagnetic bcc Fe
• Large anomalous Hall effect driven by non-vanishing Berry curvature in non-collinear antiferromagnetic Mn3Ge
• Anomalous Hall effect arising from noncollinear antiferromagnetism
• Universal Scaling Behavior of Anomalous Hall Effect and Anomalous Nernst Effect in Itinerant Ferromagnets
• Large magneto-optical Kerr effect and imaging of magnetic octupole domains in an antiferromagnetic metal
• Non-collinear Antiferromagnets and the Anomalous Hall Effect
• Giant Anomalous Hall Effect in the Chiral Antiferromagnet Mn3Ge
• Giant and anisotropic many-body spin-orbit tunability in a strongly correlated kagome magnet
• Strong, anisotropic anomalous Hall effect and spin Hall effect in chiral antiferromagnetic compounds Mn${}_{3}X$ ($X$ = Ge, Sn, Ga, Ir, Rh and Pt)
• Anomalous Nernst and Righi-Leduc effects in Mn${}_3$Sn: Berry curvature and entropy flow
• Intrinsic Quantum Anomalous Hall Effect in the Kagome Lattice Cs2LiMn3F12
• A Piezoelectric, Strain-Controlled Antiferromagnetic Memory Insensitive to Magnetic Fields
• Anomalous Hall Effect in Thin Film of the Weyl Antiferromagnet Mn${}_3$Sn
• Field induced topological Hall effect in non-coplanar triangular antiferromagnetic geometry of Mn3Sn
• Magnetic Phase Dependence of the Anomalous Hall Effect in Mn${}_3$Sn Single Crystals
• Anomalous and topological Hall effects in epitaxial thin films of the noncollinear antiferromagnet Mn${}_3$Sn
• Spontaneous decays of magneto-elastic excitations in noncollinear antiferromagnet (Y,Lu)MnO3
• Evaluation of spin diffusion length and spin Hall angle of antiferromagnetic Weyl semimetal Mn${}_3$Sn
• Electrical current switching of the noncollinear antiferromagnet Mn${}_3$GaN
• Many-body Resonance in a Correlated Topological Kagome Antiferromagnet
• Spin structure and spin Hall magnetoresistance of epitaxial thin films of the insulating non-collinear antiferromagnet SmFeO${}_3$
• Robust magnetotransport in disordered ferromagnetic kagome layers with quantum anomalous Hall effect

Cited by in corpus (5)

• Large intrinsic anomalous Hall effect in both Nb${}_2$FeB${}_2$ and Ta${}_2$FeB${}_2$ with collinear antiferromagnetism
• Observation of an Anomalous Hall Effect in Single-crystal Mn3Pt
• Observation of unconventional spin polarization induced spin orbit torque in L1${}_2$-ordered antiferromagnetic Mn${}_3$Pt thin films
• Investigating the intrinsic anomalous Hall effect in MnPt3 topological semimetal
• Magnetoresistivity in the Antiferromagnetic Hubbard Model