Enhanced ferromagnetism in WS2 via defect engineering

Xiang Ding; Ting Liu; Sohail Ahmed; Nina Bao; Jun Ding; Jiabao Yi

doi:10.1016/j.jallcom.2018.09.088

Enhanced ferromagnetism in WS₂ via defect engineering

Xiang Ding
, Ting Liu
, Sohail Ahmed
, Nina Bao
, Jun Ding
, Jiabao Yi^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

61 Scopus citations

Abstract

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 WS₂ powders as an example to study the relationship between defects and magnetism by annealing the powders under reducing atmosphere. Magnetic measurements indicate that pristine WS₂ powders show weak ferromagnetism at room temperature. Compared to pristine WS₂ powder, 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.

Original language	English
Pages (from-to)	740-744
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	772
DOIs	https://doi.org/10.1016/j.jallcom.2018.09.088
State	Published - 25 Jan 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2018 Elsevier B.V.

Keywords

Annealing
Defects
Ferromagnetism
Transition metal dichalcogenides

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2018.09.088

Cite this

@article{ff04a7dddbc4467c80763c3f2e41ff99,

title = "Enhanced ferromagnetism in WS2 via defect engineering",

abstract = "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 WS2 powders as an example to study the relationship between defects and magnetism by annealing the powders under reducing atmosphere. Magnetic measurements indicate that pristine WS2 powders show weak ferromagnetism at room temperature. Compared to pristine WS2 powder, 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.",

keywords = "Annealing, Defects, Ferromagnetism, Transition metal dichalcogenides",

author = "Xiang Ding and Ting Liu and Sohail Ahmed and Nina Bao and Jun Ding and Jiabao Yi",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2019",

month = jan,

day = "25",

doi = "10.1016/j.jallcom.2018.09.088",

language = "English",

volume = "772",

pages = "740--744",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Enhanced ferromagnetism in WS2 via defect engineering

AU - Ding, Xiang

AU - Liu, Ting

AU - Ahmed, Sohail

AU - Bao, Nina

AU - Ding, Jun

AU - Yi, Jiabao

PY - 2019/1/25

Y1 - 2019/1/25

N2 - 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 WS2 powders as an example to study the relationship between defects and magnetism by annealing the powders under reducing atmosphere. Magnetic measurements indicate that pristine WS2 powders show weak ferromagnetism at room temperature. Compared to pristine WS2 powder, 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.

AB - 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 WS2 powders as an example to study the relationship between defects and magnetism by annealing the powders under reducing atmosphere. Magnetic measurements indicate that pristine WS2 powders show weak ferromagnetism at room temperature. Compared to pristine WS2 powder, 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.

KW - Annealing

KW - Defects

KW - Ferromagnetism

KW - Transition metal dichalcogenides

UR - https://www.scopus.com/pages/publications/85053562844

U2 - 10.1016/j.jallcom.2018.09.088

DO - 10.1016/j.jallcom.2018.09.088

M3 - Article

AN - SCOPUS:85053562844

SN - 0925-8388

VL - 772

SP - 740

EP - 744

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -