Robust Half-Metallicity in a Chromium-Substituted AlN  

作　　者：S.Arif Iftikhar Ahmad B.Amin H.A.Rahnamaye Aliabad 

机构地区：[1]Materials Modeling Laboratory,Department of Physics,Hazara University,Mansehra,Pakistan [2]Department of Physics,University of Malakand,Chakdara,Pakistan [3]Department of Physics,Sabzevar Tarbiat Moallem University,Sabzevar,Iran

出　　处：《Chinese Physics Letters》2011年第10期270-273,共4页中国物理快报（英文版）

摘　　要：We investigate half metallicity in a chromium(Cr)-substituted AlN dilute magnetic semiconductor using the full-potential linearized augmented plane-wave method.Our results show that Al_(0.75)Cr_(0.25)N is half metal and holds a net integer magnetic moment of 3μβwith lattice compression.The half−metallic nature is maintained from the relaxed lattice constant 4.36Åto 4.09Å.An abrupt change of the physical properties is observed at a robust transition lattice constant of 4.09Å,and the material transforms from half metal to metal.We find that up to 6%compression,the material maintains its half-metallic nature.Furthermore,we also confirm that the origin of ferromagnetism in Al_(0.75)Cr_(0.25)N is double exchange.

关 键 词：METALLIC LATTICE CHROMIUM 

分 类 号：TG1[金属学及工艺—金属学]