Local structure and magnetic properties of Mn and Co co-doped SiC films

Local structure and magnetic properties of Mn and Co co-doped SiC films Mn and Co co-doped SiC films were deposited on Si substrates by magnetron sputtering technique. The structure and magnetism of the films were investigated systematically. X-ray diffraction and X-ray photo-electron spectroscopy clearly show that the films are composed of 3C-SiC, in which Mn atoms substitute for the C sites of SiC lattice and Co atoms form CoSi compounds. The valence analysis displays that Mn and Co elements exist in the form of Mn2+ and Co2+ ions in the films, respectively. The magnetic analysis indicates that the films are ferromagnetic at room-temperature and the saturation magnetization increases with increasing Mn substitution concentration. There are two ferromagnetic phases in the films, the Curie temperature at 240 K is associated with CoSi nanoparticles, while the Curie temperature observed above 300 K come from Mn substitution and some extended defects. These features reveal that the room-temperature ferromagnetism of Mn and Co co-doped SiC films is intrinsic property of the material. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Materials Science: Materials in Electronics Springer Journals

Local structure and magnetic properties of Mn and Co co-doped SiC films

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Materials Science; Optical and Electronic Materials; Characterization and Evaluation of Materials
ISSN
0957-4522
eISSN
1573-482X
D.O.I.
10.1007/s10854-018-9412-6
Publisher site
See Article on Publisher Site

Abstract

Mn and Co co-doped SiC films were deposited on Si substrates by magnetron sputtering technique. The structure and magnetism of the films were investigated systematically. X-ray diffraction and X-ray photo-electron spectroscopy clearly show that the films are composed of 3C-SiC, in which Mn atoms substitute for the C sites of SiC lattice and Co atoms form CoSi compounds. The valence analysis displays that Mn and Co elements exist in the form of Mn2+ and Co2+ ions in the films, respectively. The magnetic analysis indicates that the films are ferromagnetic at room-temperature and the saturation magnetization increases with increasing Mn substitution concentration. There are two ferromagnetic phases in the films, the Curie temperature at 240 K is associated with CoSi nanoparticles, while the Curie temperature observed above 300 K come from Mn substitution and some extended defects. These features reveal that the room-temperature ferromagnetism of Mn and Co co-doped SiC films is intrinsic property of the material.

Journal

Journal of Materials Science: Materials in ElectronicsSpringer Journals

Published: Jun 6, 2018

References

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