Visualizing ferromagnetic domains in magnetic topological insulators
We report a systematic study of ferromagnetic domains in both single-crystal and thin-film specimens of magnetic topological insulators Cr doped (Bi0.1Sb0.9)2Te3 using magnetic force microscopy (MFM). The temperature and field dependences of MFM and in situ resistance data are consistent with previo...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2015-08-01
|
| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/1.4921093 |
| _version_ | 1818054574861189120 |
|---|---|
| author | Wenbo Wang Fang Yang Chunlei Gao Jinfeng Jia G. D. Gu Weida Wu |
| author_facet | Wenbo Wang Fang Yang Chunlei Gao Jinfeng Jia G. D. Gu Weida Wu |
| author_sort | Wenbo Wang |
| collection | DOAJ |
| description | We report a systematic study of ferromagnetic domains in both single-crystal and thin-film specimens of magnetic topological insulators Cr doped (Bi0.1Sb0.9)2Te3 using magnetic force microscopy (MFM). The temperature and field dependences of MFM and in situ resistance data are consistent with previous bulk transport and magnetic characterization. Bubble-like ferromagnetic domains were observed in both single crystals and thin films. Significantly, smaller domain size (∼500 nm) with narrower domain wall (∼150 − 300 nm) was observed in thin films of magnetic topological insulators, likely due to vertical confinement effect. These results suggest that thin films are more promising for visualization of chiral edge states. |
| first_indexed | 2024-12-10T11:59:13Z |
| format | Article |
| id | doaj.art-ec19e7d2e56347818e4c28a0e7faf7d2 |
| institution | Directory Open Access Journal |
| issn | 2166-532X |
| language | English |
| last_indexed | 2024-12-10T11:59:13Z |
| publishDate | 2015-08-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj.art-ec19e7d2e56347818e4c28a0e7faf7d22022-12-22T01:49:40ZengAIP Publishing LLCAPL Materials2166-532X2015-08-0138083301083301-710.1063/1.4921093001593APMVisualizing ferromagnetic domains in magnetic topological insulatorsWenbo Wang0Fang Yang1Chunlei Gao2Jinfeng Jia3G. D. Gu4Weida Wu5Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USAKey Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai 200240, People’s Republic of ChinaKey Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai 200240, People’s Republic of ChinaKey Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai 200240, People’s Republic of ChinaCondensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USADepartment of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USAWe report a systematic study of ferromagnetic domains in both single-crystal and thin-film specimens of magnetic topological insulators Cr doped (Bi0.1Sb0.9)2Te3 using magnetic force microscopy (MFM). The temperature and field dependences of MFM and in situ resistance data are consistent with previous bulk transport and magnetic characterization. Bubble-like ferromagnetic domains were observed in both single crystals and thin films. Significantly, smaller domain size (∼500 nm) with narrower domain wall (∼150 − 300 nm) was observed in thin films of magnetic topological insulators, likely due to vertical confinement effect. These results suggest that thin films are more promising for visualization of chiral edge states.http://dx.doi.org/10.1063/1.4921093 |
| spellingShingle | Wenbo Wang Fang Yang Chunlei Gao Jinfeng Jia G. D. Gu Weida Wu Visualizing ferromagnetic domains in magnetic topological insulators APL Materials |
| title | Visualizing ferromagnetic domains in magnetic topological insulators |
| title_full | Visualizing ferromagnetic domains in magnetic topological insulators |
| title_fullStr | Visualizing ferromagnetic domains in magnetic topological insulators |
| title_full_unstemmed | Visualizing ferromagnetic domains in magnetic topological insulators |
| title_short | Visualizing ferromagnetic domains in magnetic topological insulators |
| title_sort | visualizing ferromagnetic domains in magnetic topological insulators |
| url | http://dx.doi.org/10.1063/1.4921093 |
| work_keys_str_mv | AT wenbowang visualizingferromagneticdomainsinmagnetictopologicalinsulators AT fangyang visualizingferromagneticdomainsinmagnetictopologicalinsulators AT chunleigao visualizingferromagneticdomainsinmagnetictopologicalinsulators AT jinfengjia visualizingferromagneticdomainsinmagnetictopologicalinsulators AT gdgu visualizingferromagneticdomainsinmagnetictopologicalinsulators AT weidawu visualizingferromagneticdomainsinmagnetictopologicalinsulators |