Room Temperature Ferromagnetism and Optical Tunability in Cu Doped GaN Nanowires

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2008,（8）
• 页码范围: 3040-3043
• 页数: 4页
• 语种: 英文

摘要

CaN nanowires doped with 2at.% and 6at.% Cu ions are synthesized by chemical vapour deposition method. Structural and compositional analyses demonstrate that the as-grown nanowires are of single crystal wurtzite CaN structure. Magnetic characterizations reveal that the doped CaN nanowires exhibit room temperature ferromagnetism. The measured saturation magnetic moments are 0.37μB and 0.47μB per Cu atom at 300 K for Cu 2at.% and 6at.%, respectively. The photoluminescence spectra show that Cu dopant can tune the band gap of the CaN, which leads to a red shift of band-edge emission with increasing dopant concentration.