Ferromagnetism in cobalt doped n-GaN

B. Sundaravel; K. G. M. Nair; K. H. Chen; L. C. Chen; M. C. Valsakumar; R. Kesavamoorthy; S. Dhara; T. V. Chandrasekhar Rao

arxiv: 0708.2217 · v1 · submitted 2007-08-16 · ❄️ cond-mat.mtrl-sci

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 This is my paper

classification ❄️ cond-mat.mtrl-sci

keywords atomicdopedferromagneticmagneticn-ganorderinganalyzedaround

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Ferromagnetic 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.

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Ferromagnetism in cobalt doped n-GaN

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