Evidence for ferromagnetic coupling at the doped topological insulator/ferrimagnetic insulator interface
One of the major obstacles of the magnetic topological insulators (TIs) impeding their practical use is the low Curie temperature (T[subscript c] ). Very recently, we have demonstrated the enhancement of the magnetic ordering in Cr-doped Bi₂Se₃ by means of proximity to the high-T[subscript c] ferri...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
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American Institute of Physics (AIP)
2017
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| Online Access: | http://hdl.handle.net/1721.1/111957 https://orcid.org/0000-0003-2262-1249 |
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| author | Liu, Wenqing He, Liang Zhou, Yan Murata, Koichi Jiang, Ying Wang, Yong Xu, Yongbing Zhang, Rong Wang, Kang. L. Onbasli, Mehmet C. Ross, Caroline A |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Liu, Wenqing He, Liang Zhou, Yan Murata, Koichi Jiang, Ying Wang, Yong Xu, Yongbing Zhang, Rong Wang, Kang. L. Onbasli, Mehmet C. Ross, Caroline A |
| author_sort | Liu, Wenqing |
| collection | MIT |
| description | One of the major obstacles of the magnetic topological insulators (TIs) impeding their practical use is the low Curie temperature (T[subscript c] ). Very recently, we have demonstrated the enhancement of the magnetic ordering in Cr-doped Bi₂Se₃ by means of proximity to the high-T[subscript c] ferrimagnetic insulator (FMI) Y₃Fe₅O₁₂ and found a large and rapidly decreasing penetration depth of the proximity effect, suggestive of a different carrier propagation process near the TI surface. Here we further present a study of the interfacial magnetic interaction of this TI/FMI heterostrucutre. The synchrotron-based X-ray magnetic circular dichroism (XMCD) technique was used to probe the nature of the exchange coupling of the Bi[subscript 2-x] Cr [subscript x] Se₃/Y₃Fe₅O₁₂ interface. We found that the Bi[subscript 2-x] Cr [subscript x] Se₃ grown on Y₃Fe₅O₁₂ (111) predominately contains Cr ³⁺ cations, and the spin direction of the Cr³⁺ is aligned parallel to that of tetrahedral Fe³⁺ of the YIG, revealing a ferromagnetic exchange coupling between the Bi [subscript 2-x] Cr [subscript x] Se₃ and the Y₃Fe₅O₁₂. |
| first_indexed | 2024-09-23T09:57:57Z |
| format | Article |
| id | mit-1721.1/111957 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T09:57:57Z |
| publishDate | 2017 |
| publisher | American Institute of Physics (AIP) |
| record_format | dspace |
| spelling | mit-1721.1/1119572022-09-30T18:01:30Z Evidence for ferromagnetic coupling at the doped topological insulator/ferrimagnetic insulator interface Liu, Wenqing He, Liang Zhou, Yan Murata, Koichi Jiang, Ying Wang, Yong Xu, Yongbing Zhang, Rong Wang, Kang. L. Onbasli, Mehmet C. Ross, Caroline A Massachusetts Institute of Technology. Department of Materials Science and Engineering Onbasli, Mehmet C. Ross, Caroline A One of the major obstacles of the magnetic topological insulators (TIs) impeding their practical use is the low Curie temperature (T[subscript c] ). Very recently, we have demonstrated the enhancement of the magnetic ordering in Cr-doped Bi₂Se₃ by means of proximity to the high-T[subscript c] ferrimagnetic insulator (FMI) Y₃Fe₅O₁₂ and found a large and rapidly decreasing penetration depth of the proximity effect, suggestive of a different carrier propagation process near the TI surface. Here we further present a study of the interfacial magnetic interaction of this TI/FMI heterostrucutre. The synchrotron-based X-ray magnetic circular dichroism (XMCD) technique was used to probe the nature of the exchange coupling of the Bi[subscript 2-x] Cr [subscript x] Se₃/Y₃Fe₅O₁₂ interface. We found that the Bi[subscript 2-x] Cr [subscript x] Se₃ grown on Y₃Fe₅O₁₂ (111) predominately contains Cr ³⁺ cations, and the spin direction of the Cr³⁺ is aligned parallel to that of tetrahedral Fe³⁺ of the YIG, revealing a ferromagnetic exchange coupling between the Bi [subscript 2-x] Cr [subscript x] Se₃ and the Y₃Fe₅O₁₂. United States. Defense Advanced Research Projects Agency (N66001-12-1-4034) United States. Defense Advanced Research Projects Agency (N66001-11-1-4105) 2017-10-23T16:22:25Z 2017-10-23T16:22:25Z 2016-03 2016-01 2017-10-17T15:57:06Z Article http://purl.org/eprint/type/JournalArticle 2158-3226 http://hdl.handle.net/1721.1/111957 Liu, Wenqing et al. “Evidence for Ferromagnetic Coupling at the Doped Topological Insulator/ferrimagnetic Insulator Interface.” AIP Advances 6, 5 (May 2016): 055813 © 2016 Author(s) https://orcid.org/0000-0003-2262-1249 http://dx.doi.org/10.1063/1.4943157 AIP Advances Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0/ application/pdf American Institute of Physics (AIP) American Institute of Physics (AIP) |
| spellingShingle | Liu, Wenqing He, Liang Zhou, Yan Murata, Koichi Jiang, Ying Wang, Yong Xu, Yongbing Zhang, Rong Wang, Kang. L. Onbasli, Mehmet C. Ross, Caroline A Evidence for ferromagnetic coupling at the doped topological insulator/ferrimagnetic insulator interface |
| title | Evidence for ferromagnetic coupling at the doped topological insulator/ferrimagnetic insulator interface |
| title_full | Evidence for ferromagnetic coupling at the doped topological insulator/ferrimagnetic insulator interface |
| title_fullStr | Evidence for ferromagnetic coupling at the doped topological insulator/ferrimagnetic insulator interface |
| title_full_unstemmed | Evidence for ferromagnetic coupling at the doped topological insulator/ferrimagnetic insulator interface |
| title_short | Evidence for ferromagnetic coupling at the doped topological insulator/ferrimagnetic insulator interface |
| title_sort | evidence for ferromagnetic coupling at the doped topological insulator ferrimagnetic insulator interface |
| url | http://hdl.handle.net/1721.1/111957 https://orcid.org/0000-0003-2262-1249 |
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