Structural, optical, and magnetic properties of Cu-implanted GaN films

Structural, optical, and magnetic properties of Cu-implanted GaN films
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Cu 注入 GaN 薄膜的结构、光学和磁特性

DOI:
10.1063/1.3079519
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发表时间:
2009-03
影响因子:
3.2
通讯作者:
Zhang, Y.
Zhang, Y.
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Wang, C. D.;Yang, Z. J.;Chen, Z. T.;Pei, X. D.;Yao, S. D.;Zhang, G. Y.;Ding, Z. B.;Wang, K.;Yang, X. L.;Zhang, Y.

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研究了Cu离子注入GaN薄膜的结构、光学和磁性。在仪器的分辨率范围内没有发现第二相,但薄膜中存在空位等晶格缺陷。室温下观察到铁磁性,饱和磁化强度为0.3μB/Cu原子。场冷磁化曲线可以很好地拟合居里-外斯模型和标准的三维自旋波模型在低温和高温范围内,分别。我们的研究结果表明,在理解所观察到的Cu注入GaN薄膜的磁性时,应考虑空位缺陷。
The structural, optical, and magnetic properties of Cu-implanted GaN films have been investigated. No secondary phase was found within the resolution limit of the instrument but the lattice defects such as vacancies were present in the film. Room temperature ferromagnetism was observed with saturation magnetization of 0.3μB/Cu atom. The field-cooled magnetization curves can be well fitted by a Curie-Weiss model and a standard three-dimensional spin-wave model in the low and high temperature ranges, respectively. Our findings indicate that the vacancylike defects should be considered in understanding the observed magnetic properties of the Cu-implanted GaN films.
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