Electron spin resonance study of CuGa1-xMnxSe2 magnetic semiconducting compounds

被引:1
|
作者
Fermin, Jose R. [1 ]
Nava, Alexander [1 ]
Durante-Rincon, C. A. [1 ]
Castro, Jaime [1 ]
Silva, Pedro J. [2 ]
机构
[1] Univ Zulia, Dept Fis, Fac Ciencias, Maracaibo 4001, Zulia, Venezuela
[2] Inst Venezolano Invest Cient, Ctr Fis, Lab Fis Mat Condensada, Caracas 1020A, Venezuela
关键词
Spin resonance; Resonance linewidth; Diluted magnetic semiconductors; CuGaMnSe; PARAMAGNETIC-RESONANCE; CD1-XMNXTE; CUGASE2; EPR; RES;
D O I
10.1016/j.jmmm.2012.09.026
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We report on the magnetic properties of the diluted magnetic semiconductor CuGa1-xMnxSe2. For this, Electron spin resonance (ESR) experiments in the temperature range 70 K < T < 300 K, were performed. The samples were synthesized by direct fusion of stoichiometric mixtures of the elements, with Mn composition from x = 0.0 to 0.25. The ESR integral intensity, resonance field, and linewidth, have been measured as functions of temperature and Mn concentration. We identify a paramagnetic phase above a critical temperature of the order of 250-260 K. Below this temperature, the spin system reorders into certain magnetic phase not well identified. The inclusion of Mn induces local fields that increase the resonance field, with resulting g-values less than 2.0. The behavior of the ESR linewidth is similar to that observed in II-Mn-VI alloys, and can be described by the modified Huber equation. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:79 / 81
页数:3
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