Journal article
Kerr effect anomaly in magnetic topological insulator superlattices
- Abstract:
- We report the magneto-optical Kerr effect (MOKE) study of magnetic topological insulator superlattice films with alternating transition-metal and rare-earth doping. We observe an unexpected hump in the MOKE hysteresis loops upon magnetization reversal at low temperatures, reminiscent of the topological Hall effect(THE) reported in transport measurements. The THE is commonly associated with the existence of magnetic skyrmions, i.e., chiral spin textures originating from topological defects in real space. Here, the observation of the effect is tied to ferromagnetic ordering in the rare-earth-doped layers of the superlattice. Our study may provide a new approach for the non-invasive optical investigation of skyrmions in magnetic films, complementary to electrical transport measurements, where the topological Hall signal is often the only hint of non-trivial magnetization patterns.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, 1.2MB, Terms of use)
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- Publisher copy:
- 10.1088/1361-6528/aba210
Authors
- Publisher:
- IOP Publishing
- Journal:
- Nanotechnology More from this journal
- Volume:
- 31
- Issue:
- 43
- Article number:
- 434001
- Publication date:
- 2020-08-03
- Acceptance date:
- 2020-07-02
- DOI:
- ISSN:
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0957-4484
- Language:
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English
- Keywords:
- Pubs id:
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1115589
- Local pid:
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pubs:1115589
- Deposit date:
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2020-07-02
Terms of use
- Copyright holder:
- Liu et al.
- Copyright date:
- 2020
- Rights statement:
- Copyright © 2020 The Author(s). Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
- Licence:
- CC Attribution (CC BY)
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