Ferromagnetism in cobalt doped n-GaN

Ferromagnetism in cobalt doped n-GaN

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. L...

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Veröffentlicht in:arXiv.org 2007-08
Hauptverfasser: Dhara, S, Sundaravel, B, Nair, K G M, Kesavamoorthy, R, Valsakumar, M C, Chandrasekhar Rao, T V, Chen, L C, Chen, K H
Format: Artikel
Sprache:eng
Schlagworte:
Channeling
Curie temperature
Emission analysis
Ferromagnetism
Implantation
Magnetic moments
Magnetism
Physics - Materials Science
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Zusammenfassung: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.
ISSN:2331-8422
DOI:10.48550/arxiv.0708.2217