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Title: Enhancement of magnetism by structural phase transition in MoS{sub 2}

The magnetic properties of 2H phase of MoS{sub 2} (2H-MoS{sub 2}) and 1T phase of MoS{sub 2} (1T-MoS{sub 2}) were investigated both experimentally and theoretically. Lithium (Li) intercalation method was used to prepare single-layer MoS{sub 2} sheets. It was found that pristine MoS{sub 2} (2H-MoS{sub 2}) exhibited weak diamagnetism. After exfoliating by Li intercalation, the crystal structure transformed from 2H to 1T phase, and the magnetism was significantly enhanced from diamagnetism to paramagnetism accordingly. With further annealing in argon atmosphere, the 2H phase recovered gradually from 1T phase, and the magnetism decreased correspondingly. Using crystal field theory and combining the results of first principle calculation, we conclude that the enhanced magnetism can be attributed to the Mo atoms of 1T-MoS{sub 2}.
Authors:
 [1] ;  [2] ; ; ; ;  [1] ; ;  [3]
  1. Nanjing National Laboratory of Microstructures and Jiangsu Provincial Laboratory for Nanotechnology, Nanjing University, Nanjing 210093 (China)
  2. (China)
  3. Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000 (China)
Publication Date:
OSTI Identifier:
22395657
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANNEALING; ARGON; ATOMS; CLATHRATES; CRYSTAL FIELD; CRYSTAL STRUCTURE; DIAMAGNETISM; LITHIUM; MAGNETIC PROPERTIES; MOLYBDENUM SULFIDES; PARAMAGNETISM; PHASE TRANSFORMATIONS