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Enhancing Magnetic Ordering in Cr-Doped Bi[subscript 2]Se[subscript 3] Using High-T[subscript C] Ferrimagnetic Insulator
| Content Provider | Semantic Scholar |
|---|---|
| Author | Liu, Wenqing He, Liang Xu, Yongbing Murata, Koichi Lang, Murong Maltby, N. J. Li, Shunpu Wang, Xuefeng Ross, Caroline A. Bencok, Peter Laan, Gerrit Van Der Zhang, Rong Wang, Kang L. Onbasli, Mehmet Cengiz |
| Copyright Year | 2014 |
| Abstract | 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-TC 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 TC 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 K 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. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://dspace.mit.edu/bitstream/handle/1721.1/102186/Ross_Enhancing%20magnetic.pdf;sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |