Magnetic Proximity Effect and Interlayer Exchange Coupling of Ferromagnetic/Topological Insulator/Ferromagnetic Trilayer

Abstract

Magnetic proximity effect between topological insulator (TI) and ferromagnetic insulator (FMI) is considered to have great potential in spintronics. However, a complete determination of interfacial magnetic structure has been highly challenging. We theoretically investigate the interlayer exchange coupling of two FMIs separated by a TI thin film, and show that the particular electronic states of the TI contributing to the proximity effect can be directly identified through the coupling behavior between two FMIs, together with a tunability of coupling constant. Such FMI/TI/FMI structure not only serves as a platform to clarify the magnetic structure of FMI/TI interface, but also provides insights into designing the magnetic storage devices with ultrafast response.

arXiv comment7 pages, 4 figures

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Cited by in corpus (16)

• Independent tuning of electronic properties and induced ferromagnetism in topological insulators with heterostructure approach
• Proximity Driven Enhanced Magnetic Order at Ferromagnetic Insulator / Magnetic Topological Insulator Interface
• Dynamical Axion Field in a Magnetic Topological Insulator Superlattice
• Amperean Pairing at the Surface of Topological Insulators
• Dirac-Electrons-Mediated Magnetic Proximity Effect in Topological Insulator / Magnetic Insulator Heterostructures
• Modulating Super-Exchange Strength to Achieve Robust Ferromagnetic Couplings in Two-Dimensional Semiconductors
• Pure spin current devices based on ferromagnetic topological insulators
• Elucidating proximity magnetism through polarized neutron reflectometry and machine learning
• Magnetic proximity effect of a topological insulator and a ferromagnet in thin film bilayers of $BiSbT{e}_3$ and $SrRu{O}_3$
• Fluctuation-induced Néel and Bloch skyrmions at topological insulator surfaces
• Interface electronic structure at the topological insulator - ferrimagnetic insulator junction
• Effect of surface hybridization on RKKY coupling in ferromagnet/topological insulator/ferromagnet trilayer system
• Finite temperature fluctuation-induced order and responses in magnetic topological insulators
• Voltage-driven exchange resonance achieving 100\% mechanical efficiency
• Carrier Density and Thickness Dependent Proximity Effect in Doped Topological Insulator -- Metallic Ferromagnet Bilayers
• Interface-Induced Stability of Nontrivial Topological Spin Textures: Unveiling Room-Temperature Hopfions and Skyrmions