Journal
PHYSICAL REVIEW B
Volume 91, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.91.014427
Keywords
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Funding
- MIT MRSEC through the MRSEC Program of the NSF [DMR-0819762]
- NSF [1207469, N00014-13-1-0301]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1207469] Funding Source: National Science Foundation
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The magnetic proximity effect between the 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 the coupling constant. Such an FMI/TI/FMI structure not only serves as a platform to clarify the magnetic structure of the FMI/TI interface, but also provides insights in designing the magnetic storage devices with ultrafast response.
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