Strongly exchange-coupled and surface-state-modulated magnetization dynamics in Bi2Se3/YIG heterostructures

Abstract

We report strong interfacial exchange coupling in Bi2Se3/yttrium iron garnet (YIG) bilayers manifested as large in-plane interfacial magnetic anisotropy (IMA) and enhancement of damping probed by ferromagnetic resonance (FMR). The IMA and spin mixing conductance reached a maximum when Bi2Se3 was around 6 quintuple-layer (QL) thick. The unconventional Bi2Se3 thickness dependence of the IMA and spin mixing conductance are correlated with the evolution of surface band structure of Bi2Se3, indicating that topological surface states play an important role in the magnetization dynamics of YIG. Temperature-dependent FMR of Bi2Se3/YIG revealed signatures of magnetic proximity effect of $T_c$ as high as 180 K, and an effective field parallel to the YIG magnetization direction at low temperature. Our study sheds light on the effects of topological insulators on magnetization dynamics, essential for development of TI-based spintronic devices.

arXiv comment16 pages, 4 figures, supplemental material

References in corpus (35)

• Topological Insulators
• Topological insulators and superconductors
• Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Topological Field Theory of Time-Reversal Invariant Insulators
• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• First observation of Spin-Momentum Helical Locking in Bi2Se3 and Bi2Te3, demonstration of Topological-Order at 300K and a realization of topological-transport-regime
• Enhanced Gilbert Damping in Thin Ferromagnetic Films
• Spin Transfer Torque Generated by the Topological Insulator Bi_2Se_3
• Crossover of Three-Dimensional Topological Insulator of Bi2Se3 to the Two-Dimensional Limit
• Nonlocal magnetization dynamics in ferromagnetic heterostructures
• Scaling of spin Hall angle in 3d, 4d and 5d metals from Y3Fe5O12/metal spin pumping
• Room temperature spin-orbit torque switching induced by a topological insulator
• Topological Phase Transition and Texture Inversion in a Tunable Topological Insulator
• Inverse Spin-Galvanic Effect in a Topological-Insulator/Ferromagnet Interface
• Spin-pumping into surface states of topological insulator α-Sn, spin to charge conversion at room temperature
• Emergent quantum confinement at topological insulator surfaces
• Surface state dominated spin-charge current conversion in topological insulator/ferromagnetic insulator heterostructures
• Spin-current probe for phase transition in an insulator
• Magnetic proximity effect at the 3D topological insulator/magnetic insulator interface
• Enhanced spin pumping efficiency in antiferromagnetic IrMn thin films around the magnetic phase transition
• Dynamics of magnetization on the topological surface
• Observation of Quantum-Tunneling Modulated Spin Texture in Ultrathin Topological Insulator Bi2Se3 Films
• Strain-Tunable Magnetocrystalline Anisotropy in Epitaxial Y3Fe5O12 Thin Films
• Anomalous Hall hysteresis in Tm3Fe5O12/Pt with strain-induced perpendicular magnetic anisotropy
• Independent tuning of electronic properties and induced ferromagnetism in topological insulators with heterostructure approach
• Enhanced DC Spin Pumping into a Fluctuating Ferromagnet near Tc
• Increased low-temperature damping in yttrium iron garnet thin films
• Direct measurement of proximity-induced magnetism at the interface between a topological insulator and a ferromagnet
• Enhanced spin Seebeck effect signal due to spin-momentum locked topological surface states
• Proximity Driven Enhanced Magnetic Order at Ferromagnetic Insulator / Magnetic Topological Insulator Interface
• Dirac Spin-Orbit Torques at the Surface of Topological Insulators
• Band structure and spin texture of Bi${}_2$Se${}_3$/3d ferromagnetic metal interface
• Spin-Torque Generation in Topological-Insulator-Based Heterostructures
• Electrostatically Controlled Magnetization Rotation in Ferromagnet-Topological Insulator Planar Structures

Cited by in corpus (21)

• Transport in two-dimensional topological materials: recent developments in experiment and theory
• Asymmetric skyrmion Hall effect in systems with a hybrid Dzyaloshinskii-Moriya interaction
• Changes of Magnetism in a Magnetic Insulator due to Proximity to a Topological Insulator
• Intrinsic spin Hall effect in topological insulators: A first-principles study
• Evidence for exchange Dirac gap in magneto-transport of topological insulator-magnetic insulator heterostructures
• Large unidirectional spin Hall and Rashba-Edelstein magnetoresistance in topological insulator/magnetic insulator heterostructures
• Non-Contact Spin Pumping by Microwave Evanescent Fields
• Topological insulator Bi2Se3 films on rare earth iron garnets and their high-quality interfaces
• Exotic rare earth-based materials for emerging spintronic technology
• Spin-Hall effect due to the bulk states of topological insulators: Extrinsic contribution to the conserved spin current
• Spin transfer torques due to the bulk states of topological insulators
• Voltage-driven Magnetization Switching via Dirac Magnetic Anisotropy and Spin--orbit Torque in Topological-insulator-based Magnetic Heterostructures
• Spin-to-charge conversion by spin pumping in sputtered polycrystalline Bi${}_x$Se${}_{1-x}$
• Voltage-control of damping constant in magnetic-insulator/topological-insulator bilayers
• Strong spin-dephasing in a topological insulator - paramagnet heterostructure
• Topological Insulators-Based Magnetic Heterostructure
• Skyrmion nucleation on the surface of a topological insulator
• Microwave-to-Optical Quantum Transduction Utilizing the Topological Faraday Effect of Topological Insulator Heterostructures
• Discovery of a high-temperature antiferromagnetic state and transport signatures of exchange interactions in a Bi2Se3/EuSe heterostructure
• One Analytical Approach of Rashba-Edelstein Magnetoresistance in 2D Materials
• Second-order topological insulator induced by compensated altermagnetism without bulk spin splitting