Ferromagnetism in cobalt-doped n-GaN
Journal
Applied Physics Letters
Journal Volume
88
Journal Issue
17
Pages
173110-1 - 173110-3
Date Issued
2006
Author(s)
Dhara, S.
Sundaravel, B.
Nair, K.G.M.
Kesavamoorthy, R.
Valsakumar, M.C.
Chandrasekhar Rao, T.V.
Chen, K.H.
Abstract
Ferromagnetic ordering is reported in the postannealed samples of Co doped n-GaN formed by Co+ implantation. A maximum Curie temperature ∼250K is recorded for the sample with 8at.% 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.
Publisher
American Institute of Physics
Type
journal article