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28 March 2024
 
  » arxiv » 0708.2217

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Ferromagnetism in cobalt doped n-GaN
S. Dhara ; B. Sundaravel ; K. G. M. Nair ; R. Kesavamoorthy ; M. C. Valsakumar ; T. V. Chandrasekhar Rao ; L. C. Chen ; K. H. Chen ;
Date 16 Aug 2007
AbstractFerromagnetic ordering is reported in the post-annealed samples of Co doped n-GaN formed by Co+ implantation. A maximum Curie temperature ~ 250K is recorded for the sample with 8 atomic percent Co. Particle induced x-ray emission-channeling study confirmed the substitutional Co in Ga lattice site. Local atomic arrangement around magnetic impurities is also analyzed using Raman study. A disordered model with carrier mediated coupling of localized magnetic moments is made responsible for the observed ferromagnetic ordering.
Source arXiv, 0708.2217
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