Anomalous and topological Hall effects in epitaxial thin films of the noncollinear antiferromagnet Mn${}_3$Sn

Abstract

Noncollinear antiferromagnets with a D0${}_{19}$ (space group = 194, P6${}_3$/mmc) hexagonal structure have garnered much attention for their potential applications in topological spintronics. Here, we report the deposition of continuous epitaxial thin films of such a material, Mn${}_3$Sn, and characterize their crystal structure using a combination of x-ray diffraction and transmission electron microscopy. Growth of Mn${}_3$Sn films with both (0001) c-axis orientation and (40$\bar{4}$3) texture is achieved. In the latter case, the thin films exhibit a small uncompensated Mn moment in the basal plane, quantified via magnetometry and x-ray magnetic circular dichroism experiments. This cannot account for the large anomalous Hall effect simultaneously observed in these films, even at room temperature, with magnitude ${\sigma }_{\mathrm{xy}}$ (${\mu }_{0}H$ = 0 T) = 21 ${\mathrm{\Omega }}^{-1}{\mathrm{cm}}^{-1}$ and coercive field ${\mu }_0{H}_{\mathrm{C}}$ = 1.3 T. We attribute the origin of this anomalous Hall effect to momentum-space Berry curvature arising from the symmetry-breaking inverse triangular spin structure of Mn${}_3$Sn. Upon cooling through the transition to a glassy ferromagnetic state at around 50 K, a peak in the Hall resistivity close to the coercive field indicates the onset of a topological Hall effect contribution, due to the emergence of a scalar spin chirality generating a real-space Berry phase. We demonstrate that the polarity of this topological Hall effect, and hence the chiral-nature of the noncoplanar magnetic structure driving it, can be controlled using different field cooling conditions.

References in corpus (24)

• Anomalous Hall effect
• Antiferromagnetic spintronics
• Large anomalous Hall effect driven by non-vanishing Berry curvature in non-collinear antiferromagnetic Mn3Ge
• Large anomalous Nernst effect at room temperature in a chiral antiferromagnet
• Evidence for Magnetic Weyl Fermions in a Correlated Metal
• Large magneto-optical Kerr effect and imaging of magnetic octupole domains in an antiferromagnetic metal
• Topological Weyl semimetals in the chiral antiferromagnetic materials Mn3Ge and Mn3Sn
• Non-collinear Antiferromagnets and the Anomalous Hall Effect
• Cluster multipole theory for anomalous Hall effect in antiferromagnets
• 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
• Imaging and writing magnetic domains in the non-collinear antiferromagnet Mn${}_{\text{3}}$Sn
• Large magneto-optical Kerr effect in noncollinear antiferromagnets Mn${}_{3}X$ ($X$ = Rh, Ir, or Pt)
• Anomalous Hall Effect in Thin Film of the Weyl Antiferromagnet Mn${}_3$Sn
• Berry curvature unravelled by the Nernst effect in Mn${}_3$Ge
• 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
• Spin Hall effect emerging from a chiral magnetic lattice without spin-orbit coupling
• Chiral domain walls of Mn${}_3$Sn and their memory
• Evaluation of spin diffusion length and spin Hall angle of antiferromagnetic Weyl semimetal Mn${}_3$Sn
• Weyl Fermions in antiferromagnetic Mn(3)Sn and Mn(3)Ge
• Comparing the anomalous Hall effect and the magneto-optical Kerr effect through antiferromagnetic phase transitions in Mn${}_3$Sn
• Momentum-space and real-space Berry curvatures in Mn${}_3$Sn
• Magnetic and electrical transport signatures of uncompensated moments in epitaxial thin films of the non-collinear antiferromagnet Mn${}_3$Ir

Cited by in corpus (27)

• Quantum states and intertwining phases in kagome materials
• All-electrical switching of a topological non-collinear antiferromagnet at room temperature
• Large anomalous Nernst and inverse spin-Hall effects in epitaxial thin films of Kagome semimetal Mn${}_3$Ge
• Intrinsic Magnetic Topological Materials
• Sign reversal of anomalous Hall conductivity and magnetoresistance in cubic non-collinear antiferromagnet Mn${}_3$Pt thin films
• Observation of spontaneous x-ray magnetic circular dichroism in a chiral antiferromagnet
• Distinct quantum anomalous Hall ground states induced by magnetic disorders
• Pressure controlled trimerization for switching of anomalous Hall effect in triangular antiferromagnet Mn${}_3$Sn
• Giant topological Hall effect in centrosymmetric tetragonal Mn2-xZnxSb
• Atomic Layer Epitaxy of Kagome Magnet Fe${}_3$Sn${}_2$ and Sn-modulated Heterostructures
• Role of magnetic exchange interactions in chiral-type Hall effects of epitaxial Mn${}_x$PtSn films
• Epitaxial growth of high quality $M{n}_{3}Sn$ thin films by pulsed laser deposition
• Noncollinear Antiferromagnetic Spintronics
• Magnetism in Two-Dimensional Ilmenenes: Intrinsic Order and Strong Anisotropy
• Planar Hall effect caused by the memory of antiferromagnetic domain walls in Mn${}_3$Ge
• Incommensurate Magnetic Order in the ${\mathbb{Z}}_2$ Kagome Metal GdV${}_6$Sn${}_6$
• Helicity-dependent Ultrafast Photocurrents in Weyl Magnet Mn${}_3$Sn
• Constructions and Applications of Irreducible Representations of Spin-Space Groups
• The free energy of twisting spins in Mn${}_3$Sn
• Tuning of Electrical, Magnetic, and Topological Properties of Magnetic Weyl Semimetal Mn${}_{3+x}$Ge by Fe doping
• Atomic Layer Molecular Beam Epitaxy of Kagome Magnet RMn${}_6$Sn${}_6$ (R = Er, Tb) Thin Films
• Hydrostatic and chemical pressure driven crossover from commensurate to the incommensurate state of the Weyl semimetal Mn${}_{3+x}$Sn${}_{1-x}$
• Nonequilibrium control of kagome metals
• Epitaxial Growth and Domain Structure Imaging of Kagome Magnet Fe${}_3$Sn${}_2$
• Imprinting electrically switchable scalar spin chirality by anisotropic strain in a Kagome antiferromagnet
• Efficient spin-pumping and spin transport across epitaxial Mn${}_3$Sn(0001) noncollinear antiferromagnet/permalloy interfaces
• Unusual Multiple Magnetic Transitions and Anomalous Hall Effect Observed in Antiferromagnetic Weyl Semimetal, Mn${}_{2.94}$Ge (Ge-rich)