Doping and defect engineering induced extremely high magnetization and large coercivity in Co doped MoTe2

S. Ahmed; X. Y. Cui; Peter P. Murmu; X. Ding; X. Z. Chu; C. I. Sathish; N. N. Bao; R. Liu; W. Y. Zhao; J. Kennedy; T. Tan; M. Peng; L. Wang; J. Ding; Tom Wu; X. L. Wang; S. Li; A. Vinu; S. R. Ringer; J. B. Yi

doi:10.1016/j.jallcom.2022.165750

Doping and defect engineering induced extremely high magnetization and large coercivity in Co doped MoTe₂

S. Ahmed, X. Y. Cui, Peter P. Murmu, X. Ding, X. Z. Chu, C. I. Sathish, N. N. Bao, R. Liu, W. Y. Zhao, J. Kennedy, T. Tan, M. Peng, L. Wang, J. Ding, Tom Wu, X. L. Wang, S. Li, A. Vinu, S. R. Ringer^*, J. B. Yi

^*Corresponding author for this work

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

11 Scopus citations

Abstract

Magnetism in layered two dimensional materials has attracted extensive interest. In this work, a variety of concentrations of Co dopants (1, 2 and 4 at.%) were doped into MoTe₂ single crystal by ion implantation. Magnetic results indicate that pure MoTe₂ displays a diamagnetic behavior. A small amount of Co doping induces a very high saturation magnetization. 4 % Co doping exhibits a saturation magnetization as high as 2231 emu/cm³, higher than pure metallic Fe (1958 emu/cm³). In addition, an outsized coercivity of 11 kOe was also detected in the 2 at.% Co doped MoTe₂ sample, which may be a consequence of doping-induced defects in the lattice structure, stress, anisotropic geometry of Co-Te ions and pinning effects by the defects in-between the ions. First principles density functional theory calculations reveal that doping-induced structural defects, including substitutional and interstitial Co, nanoholes as well as interstitial Mo, are responsible for the high magnetization.

Original language	English
Article number	165750
Journal	Journal of Alloys and Compounds
Volume	918
DOIs	https://doi.org/10.1016/j.jallcom.2022.165750
State	Published - 15 Oct 2022
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

Diluted magnetic semiconductor (DMS)
Ferromagnetism
Ion Implantation
Transition metal dichalcogenides (TMDCs)

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2022.165750

Cite this

Ahmed, S., Cui, X. Y., Murmu, P. P., Ding, X., Chu, X. Z., Sathish, C. I., Bao, N. N., Liu, R., Zhao, W. Y., Kennedy, J., Tan, T., Peng, M., Wang, L., Ding, J., Wu, T., Wang, X. L., Li, S., Vinu, A., Ringer, S. R., & Yi, J. B. (2022). Doping and defect engineering induced extremely high magnetization and large coercivity in Co doped MoTe₂. Journal of Alloys and Compounds, 918, Article 165750. https://doi.org/10.1016/j.jallcom.2022.165750

@article{3bec74dad1c94f46b23bc92c955c0039,

title = "Doping and defect engineering induced extremely high magnetization and large coercivity in Co doped MoTe2",

abstract = "Magnetism in layered two dimensional materials has attracted extensive interest. In this work, a variety of concentrations of Co dopants (1, 2 and 4 at.\%) were doped into MoTe2 single crystal by ion implantation. Magnetic results indicate that pure MoTe2 displays a diamagnetic behavior. A small amount of Co doping induces a very high saturation magnetization. 4 \% Co doping exhibits a saturation magnetization as high as 2231 emu/cm3, higher than pure metallic Fe (1958 emu/cm3). In addition, an outsized coercivity of 11 kOe was also detected in the 2 at.\% Co doped MoTe2 sample, which may be a consequence of doping-induced defects in the lattice structure, stress, anisotropic geometry of Co-Te ions and pinning effects by the defects in-between the ions. First principles density functional theory calculations reveal that doping-induced structural defects, including substitutional and interstitial Co, nanoholes as well as interstitial Mo, are responsible for the high magnetization.",

keywords = "Diluted magnetic semiconductor (DMS), Ferromagnetism, Ion Implantation, Transition metal dichalcogenides (TMDCs)",

author = "S. Ahmed and Cui, \{X. Y.\} and Murmu, \{Peter P.\} and X. Ding and Chu, \{X. Z.\} and Sathish, \{C. I.\} and Bao, \{N. N.\} and R. Liu and Zhao, \{W. Y.\} and J. Kennedy and T. Tan and M. Peng and L. Wang and J. Ding and Tom Wu and Wang, \{X. L.\} and S. Li and A. Vinu and Ringer, \{S. R.\} and Yi, \{J. B.\}",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

month = oct,

day = "15",

doi = "10.1016/j.jallcom.2022.165750",

language = "English",

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Ahmed, S, Cui, XY, Murmu, PP, Ding, X, Chu, XZ, Sathish, CI, Bao, NN, Liu, R, Zhao, WY, Kennedy, J, Tan, T, Peng, M, Wang, L, Ding, J, Wu, T, Wang, XL, Li, S, Vinu, A, Ringer, SR & Yi, JB 2022, 'Doping and defect engineering induced extremely high magnetization and large coercivity in Co doped MoTe₂', Journal of Alloys and Compounds, vol. 918, 165750. https://doi.org/10.1016/j.jallcom.2022.165750

TY - JOUR

T1 - Doping and defect engineering induced extremely high magnetization and large coercivity in Co doped MoTe2

AU - Ahmed, S.

AU - Cui, X. Y.

AU - Murmu, Peter P.

AU - Ding, X.

AU - Chu, X. Z.

AU - Sathish, C. I.

AU - Bao, N. N.

AU - Liu, R.

AU - Zhao, W. Y.

AU - Kennedy, J.

AU - Tan, T.

AU - Peng, M.

AU - Wang, L.

AU - Ding, J.

AU - Wu, Tom

AU - Wang, X. L.

AU - Li, S.

AU - Vinu, A.

AU - Ringer, S. R.

AU - Yi, J. B.

PY - 2022/10/15

Y1 - 2022/10/15

N2 - Magnetism in layered two dimensional materials has attracted extensive interest. In this work, a variety of concentrations of Co dopants (1, 2 and 4 at.%) were doped into MoTe2 single crystal by ion implantation. Magnetic results indicate that pure MoTe2 displays a diamagnetic behavior. A small amount of Co doping induces a very high saturation magnetization. 4 % Co doping exhibits a saturation magnetization as high as 2231 emu/cm3, higher than pure metallic Fe (1958 emu/cm3). In addition, an outsized coercivity of 11 kOe was also detected in the 2 at.% Co doped MoTe2 sample, which may be a consequence of doping-induced defects in the lattice structure, stress, anisotropic geometry of Co-Te ions and pinning effects by the defects in-between the ions. First principles density functional theory calculations reveal that doping-induced structural defects, including substitutional and interstitial Co, nanoholes as well as interstitial Mo, are responsible for the high magnetization.

AB - Magnetism in layered two dimensional materials has attracted extensive interest. In this work, a variety of concentrations of Co dopants (1, 2 and 4 at.%) were doped into MoTe2 single crystal by ion implantation. Magnetic results indicate that pure MoTe2 displays a diamagnetic behavior. A small amount of Co doping induces a very high saturation magnetization. 4 % Co doping exhibits a saturation magnetization as high as 2231 emu/cm3, higher than pure metallic Fe (1958 emu/cm3). In addition, an outsized coercivity of 11 kOe was also detected in the 2 at.% Co doped MoTe2 sample, which may be a consequence of doping-induced defects in the lattice structure, stress, anisotropic geometry of Co-Te ions and pinning effects by the defects in-between the ions. First principles density functional theory calculations reveal that doping-induced structural defects, including substitutional and interstitial Co, nanoholes as well as interstitial Mo, are responsible for the high magnetization.

KW - Diluted magnetic semiconductor (DMS)

KW - Ferromagnetism

KW - Ion Implantation

KW - Transition metal dichalcogenides (TMDCs)

UR - https://www.scopus.com/pages/publications/85132397481

U2 - 10.1016/j.jallcom.2022.165750

DO - 10.1016/j.jallcom.2022.165750

M3 - Article

AN - SCOPUS:85132397481

SN - 0925-8388

VL - 918

JO - Journal of Alloys and Compounds

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