- Title
- Enhanced ferromagnetism in WS2 via defect engineering
- Creator
- Ding, Xiang; Liu, Ting; Ahmed, Sohail; Bao, Nina; Ding, Jun; Yi, Jiabao
- Relation
- ARC.FT160100205
- Relation
- Journal of Alloys and Compounds Vol. 772, Issue 25 January 2019, p. 740-744
- Publisher Link
- http://dx.doi.org/10.1016/j.jallcom.2018.09.088
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2019
- Description
- Ferromagnetism in 2D materials has attracted extensive research interests. Defects are expected to play a pivotal role in the ferromagnetism based on theoretical calculations. However, there are few experimental results reported and mechanism of ferromagnetism associated with defects are not clear. In this paper, we employ WS2powders as an example to study the relationship between defects and magnetism by annealing the powders under reducing atmosphere. Magnetic measurements indicate that pristine WS2powders show weak ferromagnetism at room temperature. Compared to pristine WS2powder, annealed samples show significant enhancement of magnetization, which is strongly dependent on annealing temperature. The enhanced magnetization is attributed to defects induced by annealing, evidenced by X-ray photoelectron spectroscopy and electron paramagnetic resonance spectroscopy.
- Subject
- transition metal dichalcogenides; defects; annealing; ferromagnetism
- Identifier
- http://hdl.handle.net/1959.13/1392157
- Identifier
- uon:33358
- Identifier
- ISSN:0925-8388
- Rights
- © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
- Language
- eng
- Full Text
- Reviewed
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