Journal
NANO LETTERS
Volume 15, Issue 1, Pages 764-769Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl504480g
Keywords
Magnetic topological insulator; XMCD; proximity effect; ferrimagnetic insulator YIG; spintronics
Categories
Funding
- State Key Programme for Basic Research of China [2014CB921101]
- NSFC [61274102]
- UK STFC
- DARPA [N66001-12-1-4034, N66001-11-1-4105]
- FAME, a STARnet Center of DARPA
- MARCO
- NSF
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1231348] Funding Source: National Science Foundation
Ask authors/readers for more resources
We report a study of enhancing the magnetic ordering in a model magnetically doped topological insulator (TI), Bi2-xCrxSe3, via the proximity effect using a high-T-C ferrimagnetic insulator Y3Fe5O12. The FMI provides the TI with a source of exchange interaction yet without removing the nontrivial surface state. By performing the elemental specific X-ray magnetic circular dichroism (XMCD) measurements, we have unequivocally observed an enhanced T-C of 50 K in this magnetically doped TI/FMI heterostructure. We have also found a larger (6.6 nm at 30 K) but faster decreasing (by 80% from 30 to 50 K) penetration depth compared to that of diluted ferromagnetic semiconductors (DMSs), which could indicate a novel mechanism for the interaction between FMIs and the nontrivial TIs surface.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
