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No.3(pp.101-136)

Home > Issues > Volume 14 (2009) > No.3(pp.101-136)

First-principles Study on Magnetism of Cu in GaN

Journal of Magnetics, Volume 14, Number 3, 30 Sep 2009, Pages 114-116

Byung Sub Kang(Department of Physics and BK21 Physics Program, Chungbuk National University), Chul Min Heo(Department of Physics and BK21 Physics Program, Chungbuk National University), Kwang Kwyun Lyu(Department of Physics and BK21 Physics Program, Chungbuk National University), Seong Cho Yu*

(Department of Physics and BK21 Physics Program, Chungbuk National University)

Abstract

The electronic properties of Cu or Pd-doped GaN at several concentrations are examined using the full-potential linear muffin-tin orbital method. For (Cu_0.055Ga_0.945)N, the model reveals a magnetic moment of 1.47μB per supercell. The range of concentrations that are spin-polarized should be restricted within narrow limits. A paramagnetic to ferromagnetic phase transition is found to occur at a Cu concentration of 5.55%.

Keywords: Cu dopant; ferromagnetic ordering

DOI: 10.4283/JMAG.2009.14.3.114

Full Text: PDF

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