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Title: Effect of Mn doping on the structural, optical, and magnetic properties of In{sub 2}O{sub 3} films

(In{sub 1−x}Mn{sub x}){sub 2}O{sub 3} films were grown by radio frequency-magnetron sputtering technique. Effect of Mn doping on the structural, optical, and magnetic properties of films is investigated systematically. The detailed structure analyses suggest that Mn ions substitute for In{sup 3+} sites of the In{sub 2}O{sub 3} lattice in the valence of +2 states, and Mn-related secondary phases or clusters as the source of ferromagnetism is safely ruled out. All films show typical room temperature ferromagnetism. The saturation magnetization M{sub s} increases first, and then decreases, while carrier concentration n{sub c} decreases monotonically with Mn doping, implying that the ferromagnetism is not directly induced by the mediated carriers. The optical bandgap E{sub g} of films decreases monotonically with the increase of Mn concentration, and there exists a linear functional dependence between E{sub g} and n{sub c}{sup 2/3}, which is consistent with Burstein-Moss shift arguments. It can be concluded that the ferromagnetic order in Mn-doped In{sub 2}O{sub 3} films is intrinsic, arising from Mn atoms substitution for the In sites of In{sub 2}O{sub 3} lattice. The oxygen vacancies play a mediation role on the ferromagnetic couplings between the Mn ions.
Authors:
; ; ; ;  [1] ;  [2]
  1. Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, Tianjin Key Laboratory for Photoelectric Materials and Devices and School of Material Science and Engineering, Tianjin University of Technology, Tianjin 300384 (China)
  2. Beijing Synchrotron Radiation Facility (BSRF), Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China)
Publication Date:
OSTI Identifier:
22224116
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films; Journal Volume: 31; Journal Issue: 6; Other Information: (c) 2013 American Vacuum Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CARRIER DENSITY; CONCENTRATION RATIO; DOPED MATERIALS; FERROMAGNETIC MATERIALS; FERROMAGNETISM; INDIUM IONS; INDIUM OXIDES; MAGNETIC PROPERTIES; MAGNETRONS; MANGANESE COMPOUNDS; MANGANESE IONS; RADIOWAVE RADIATION; SEMICONDUCTOR MATERIALS; TEMPERATURE RANGE 0273-0400 K; THIN FILMS; VACANCIES