Anisotropy of the anomalous Hall effect in the altermagnet candidate Mn${}_5$Si${}_3$ films

Abstract

Altermagnets are compensated magnets belonging to spin symmetry groups that allow alternating spin polarizations both in the coordinate space of the crystal and in the momentum space of the electronic structure. In these materials the anisotropic local crystal environment of the different sublattices lowers the symmetry of the system so that the opposite-spin sublattices are connected only by rotations, which results in an unconventional spin-polarized band structure in the momentum space. This low symmetry of the crystal structure is expected to be reflected in the anisotropy of the anomalous Hall effect. In this work, we study the anisotropy of the anomalous Hall effect in epitaxial thin films of Mn${}_5$Si${}_3$, an altermagnetic candidate material. We first demonstrate a change in the relative Néel vector orientation when rotating the external field orientation through systematic changes in both the anomalous Hall effect and the anisotropic longitudinal magnetoresistance. We then show that the anomalous Hall effect in this material is anisotropic with the Néel vector orientation relative to the crystal structure and that this anisotropy requires high crystal quality and unlikely correlates with the magnetocrystalline anisotropy. Our results provide further systematic support to the case for considering epitaxial thin films of Mn${}_5$Si${}_3$ as an altermagnetic candidate material.

V2: AAM, Licence CC BY

References in corpus (11)

• Broken Kramers' degeneracy in altermagnetic MnTe
• Direct observation of altermagnetic band splitting in CrSb thin films
• Non-collinear Antiferromagnets and the Anomalous Hall Effect
• Observation of Giant Band Splitting in Altermagnetic MnTe
• Crystal Thermal Transport in Altermagnetic RuO2
• Anomalous transport due to Weyl fermions in the chiral antiferromagnets Mn${}_3$$X$, $X$ = Sn, Ge
• Anisotropic Magnetoresistance components in (Ga,Mn)As
• Saturation of the anomalous Hall effect at high magnetic fields in altermagnetic RuO2
• Angle-dependent magnetotransport in cubic and tetragonal ferromagnets: Application to (001)- and (113)A-oriented (Ga,Mn)As
• Crystal facet orientated Altermagnets for detecting ferromagnetic and antiferromagnetic states by giant tunneling magnetoresistance effect
• Altermagnetic surface states: towards the observation and utilization of altermagnetism in thin films, interfaces and topological materials

Cited by in corpus (42)

• Altermagnetism: Exploring New Frontiers in Magnetism and Spintronics
• Three-dimensional mapping of the altermagnetic spin splitting in CrSb
• Topological Weyl Altermagnetism in CrSb
• Superconducting phenomena in systems with unconventional magnets
• Spin-Polarized Antiferromagnetic Spintronics
• Spontaneous Anomalous Hall Effect in Two-Dimensional Altermagnets
• Third-order and fifth-order nonlinear spin-current generation in $g$-wave and $i$-wave altermagnets, and perfectly nonreciprocal spin-current in $f$-wave magnets
• Altermagnetism and superconductivity in a multiorbital t-J model
• Observation of the anomalous Nernst effect in altermagnetic candidate Mn5Si3
• Interplay of altermagnetism and pressure in hexagonal and orthorhombic MnTe
• Anisotropic spin filtering by an altermagnetic barrier in magnetic tunnel junctions
• Altermagnetic variants in thin films of Mn5Si3
• Spin-polarized Specular Andreev Reflections in Altermagnets
• Tunneling Magnetoresistance Effect in Altermagnets
• Pushing an Altermagnet to the Ultimate 2D Limit: Evidence of Symmetry Breaking in Monolayers of GdAlSi
• Altermagnetism in orthorhombic $Pnma$ structure through group theory and DFT calculations
• Intrinsic nonlinear conductivity induced by quantum geometry in altermagnets and measurement of the in-plane Néel vector
• Bulk photovoltaic effects in altermagnets
• Purely electrical detection of the spin-splitting vector in $p$-wave magnets based on linear and nonlinear conductivities
• (Anti-)Altermagnetism from Orbital Ordering in the Ruddlesden-Popper Chromates Sr${}_{n+1}$Cr${}_n$O${}_{3n+1}$
• Model Hamiltonian for Altermagnetic Topological Insulators
• Almost half-quantized planar Hall effects in $X$-wave magnets with $X=p,d,f,g,i$
• Quantum geometry and $X$-wave magnets with $X=p,d,f,g,i$
• Single-crystalline CrSb(0001) thin films grown by dc magnetron co-sputtering
• Electric and spin current vortices in altermagnets
• Exploration of Altermagnetism in $\mathrm{Ru}{\mathrm{O}}_2$
• Magnetization symmetry for the MnTe altermagnetic candidate
• Unlocking Doping Effects on Altermagnetism in MnTe: Emergence of Quasi-altermagnetism
• Even-in-magnetic field part of transverse resistivity as a probe of magnetic transitions
• Spin-dependent quasiparticle lifetimes in altermagnets
• $d$-Wave Polarization-Spin Locking in Two-Dimensional Altermagnets
• Spin Hall magnetoresistance at the altermagnetic insulator/Pt interface
• Tunneling magnetoresistance in a junction made of $X$-wave magnets with $X=p,d,f,g,i$
• Current switching behavior mediated via hinge modes in higher-order topological phases using altermagnets
• Quantum anomalous Hall effect with tunable Chern numbers induced by d-wave sublattice-staggered altermagnetism
• Effect of symmetry breaking on altermagnetism in CrSb and Formation of fragmented nodal curves
• Non-Hermitian higher-order topological insulators enabled by altermagnet engineering
• Time reversal reserved spin valve and spin transistor based on unconventional $p$-wave magnets
• Magnetic aftereffect and Barkhausen effect in thin films of the altermagnetic candidate Mn5Si3
• Quantum oscillation fingerprints of altermagnetism in hole-doped RuO2
• Unconventional Spin Valve Based on Normal Metal/Chiral Molecule/Altermagnet Junctions
• Altermagnetism from the viewpoint of chemistry