Significant Unconventional Anomalous Hall Effect in Heavy Metal/Antiferromagnetic Insulator Heterostructures

Abstract

The anomalous Hall effect (AHE) is a quantum coherent transport phenomenon that conventionally vanishes at elevated temperatures because of thermal dephasing. Therefore, it is puzzling that the AHE can survive in heavy metal (HM)/antiferromagnetic (AFM) insulator (AFMI) heterostructures at high temperatures yet disappears at low temperatures. In this paper, we report that an unconventional high-temperature AHE in HM/AFMI is observed only around the Néel temperature of AFM, with large anomalous Hall resistivity up to 40 n$\Omega$ cm. This mechanism is attributed to the emergence of a noncollinear AFM spin texture with a non-zero net topological charge. Atomistic spin dynamics simulation shows that such a unique spin texture can be stabilized by the subtle interplay among the collinear AFM exchange coupling, interfacial Dyzaloshinski-Moriya interaction, thermal fluctuation, and bias magnetic field.

References in corpus (29)

• Anomalous Hall effect
• The design and verification of Mumax3
• Antiferromagnetic spintronics
• Antiferromagnetic spintronics
• Spin Hall Magnetoresistance Induced by a Non-Equilibrium Proximity Effect
• Theory of spin Hall magnetoresistance
• Observation of the Anomalous Hall Effect in a Collinear Antiferromagnet
• Antiferromagnetic Skyrmion: Stability, Creation and Manipulation
• Spin pumping and spin-transfer torques in antiferromagnets
• Antidamping torque-induced switching in biaxial antiferromagnetic insulators
• Subterahertz spin pumping from an insulating antiferromagnet
• Enhancement of Thermally Injected Spin Current through an Antiferromagnetic Insulator
• Antiferromagnetic Half-skyrmions and Bimerons at room temperature
• Spin Hall magnetoresistance in antiferromagnet/heavy-metal heterostructures
• Topological Hall effect at above room temperature in heterostructures composed of a magnetic insulator and a heavy metal
• An alternative to the topological interpretation of the transverse resistivity anomalies in SrRuO3
• Probing Magnetism in Insulating Cr2Ge2Te6 by Induced Anomalous Hall Effect in Pt
• Anomalous Hall effect in YIG$|$Pt bilayers
• Spin-Hall Topological Hall Effect in Highly Tunable Pt/Ferrimagnetic-Insulator Bilayers
• Antiferromagnetic Skyrmion-Based Logic Gates Controlled by Electric Currents and Fields
• Bimeron Clusters in Chiral Antiferromagnets
• Negative spin Hall magnetoresistance in antiferromagnetic Cr2O3/Ta bilayer at low temperature region
• Inducing ferromagnetism and Kondo effect in platinum by paramagnetic ionic gating
• Spin Hall magnetoresistance in antiferromagnetic insulators
• Interfacial Dzyaloshinskii-Moriya Interaction of Antiferromagnetic Materials
• Spin Hall magnetoresistance in antiferromagnet/normal metal bilayers
• Image charge screening: a new approach to enhance magnetic ordering temperatures
• Berry phase manipulation in ultrathin SrRuO${}_3$ films
• Significant Unconventional Anomalous Hall Effect in Heavy Metal/Antiferromagnetic Insulator Heterostructures

Cited by in corpus (4)

• Coexistence of Anomalous Hall Effect and Weak Net Magnetization in Collinear Antiferromagnet MnTe
• Significant Unconventional Anomalous Hall Effect in Heavy Metal/Antiferromagnetic Insulator Heterostructures
• Tunable Ultrafast Dynamics of Antiferromagnetic Vortices in Nanoscale Dots
• Electrical Modulation and Probing of Antiferromagnetism in Hybrid Multiferroic Heterostructures