|
1
|
Ahmed S, Carl Cui XY, Ding X, Murmu PP, Bao N, Geng X, Xi S, Liu R, Kennedy J, Wu T, Wang L, Suzuki K, Ding J, Chu X, Clastinrusselraj Indirathankam SR, Peng M, Vinu A, Ringer SP, Yi J. Colossal Magnetization and Giant Coercivity in Ion-Implanted (Nb and Co) MoS 2 Crystals. ACS Appl Mater Interfaces 2020; 12:58140-58148. [PMID: 33375795 DOI: 10.1021/acsami.0c18150] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Colossal saturation magnetization and giant coercivity are realized in MoS2 single crystals doped with Nb and/or Co using an ion implantation method. Magnetic measurements have demonstrated that codoping with 2 at % Nb and 4 at % Co invoked a "giant" coercivity, as high as 9 kOe at 100 K. Doping solely with 5 at % Nb induces a "colossal" magnetization of 1800 emu/cm3 at 5 K, which is higher than that of metallic Co. The high magnetization is due to the formation of Nb-rich defect complexes, as confirmed by first-principles calculations. It is proposed that the high coercivity is due to the combined effects of strong directional exchange coupling induced by the Nb and Co doping and pinning effects from defects within the layered structure. This high magnetization mechanism is also applicable to 2D materials with bilayers or few layers of thickness, as indicated by first-principles calculations. Hence, this work opens a potential pathway for the development of 2D high-performance magnetic materials.
Collapse
Affiliation(s)
- Sohail Ahmed
- School of Materials Science and Engineering, UNSW, Sydney, New South Wales 2052, Australia
| | - Xiang-Yuan Carl Cui
- Australian Centre for Microscopy & Microanalysis, and School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Xiang Ding
- School of Materials Science and Engineering, UNSW, Sydney, New South Wales 2052, Australia
- School of Energy and Power Engineering, Wuhan University of Technology, Wuhan, Hubei 430063, China
| | - Peter Paul Murmu
- National Isotope Centre, GNS Science, P.O. Box 31312, Lower Hutt 5010, New Zealand
| | - Nina Bao
- Department of Materials Science and Engineering, National University of Singapore, 119260, Singapore
| | - Xun Geng
- School of Materials Science and Engineering, UNSW, Sydney, New South Wales 2052, Australia
| | - Shibo Xi
- Institute of Chemical and Engineering Sciences, A*STAR, 1 Pesek Road, Jurong Island, 627833, Singapore
| | - Rong Liu
- SIMS Facility, Office of the Deputy-Vice Chancellor (Research and Development), Western Sydney University, Locked Bag 1797, Penrith, New South Wales 2751, Australia
| | - John Kennedy
- National Isotope Centre, GNS Science, P.O. Box 31312, Lower Hutt 5010, New Zealand
| | - Tom Wu
- School of Materials Science and Engineering, UNSW, Sydney, New South Wales 2052, Australia
| | - Lan Wang
- School of Science, RMIT University, Melbourne, Victoria 3001, Australia
| | - Kiyonori Suzuki
- Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Jun Ding
- Department of Materials Science and Engineering, National University of Singapore, 119260, Singapore
| | - Xueze Chu
- Global Innovative Centre for Advanced Nanomaterials, School of Engineering, The University of Newcastle, Callaghan, New South Wales 2308, Australia
| | | | - Mingli Peng
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710069, China
| | - Ajayan Vinu
- Global Innovative Centre for Advanced Nanomaterials, School of Engineering, The University of Newcastle, Callaghan, New South Wales 2308, Australia
| | - Simon Peter Ringer
- Australian Centre for Microscopy & Microanalysis, and School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Jiabao Yi
- Global Innovative Centre for Advanced Nanomaterials, School of Engineering, The University of Newcastle, Callaghan, New South Wales 2308, Australia
| |
Collapse
|