Ferromagnetism in cobalt doped n-GaN

Details Ferromagnetism in cobalt doped n-GaN Ferromagnetism in cobalt doped n-GaN

2007-08-16

arxiv.org/abs/0708.2217v1

Applied Physics Letters 88 (17) 173110 (2006)

Physics

Condensed Matter

Materials Science

11 pages, 3 figures, Journal

Scientific paper

10.1063/1.2194347

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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