Spinodal decomposition under layer by layer growth condition and high curie temperature quasi-one-dimensional nano-structure in dilute magnetic semiconductors
Spinodal decomposition under layer by layer growth condition and high curie temperature quasi-one-dimensional nano-structure in dilute magnetic semiconductors
复制标题
DOI：
10.1143/jjap.45.l416
复制
发表时间：
2006-04-01
期刊：
影响因子：
--
通讯作者：
Dederichs, Peter H.
中科院分区：
文献类型：
--
作者：
Fukushima, Tetsuya;Sato, Kazunori;Dederichs, Peter H.
研究表明，在稀磁半导体（DMS）中，在逐层晶体生长条件下的旋节分解导致了特征性的准一维纳米结构。结果发现，DMS系统可以形成相当大的团簇高度各向异性的形状，即使在低浓度。指出了超顺磁性中的阻塞现象、磁偶极-磁偶极相互作用和一维结构的网络结构对DMS磁性的影响。基于目前的模拟结果，我们认为δ掺杂方法是实现高居里温度的有效途径。
We show that spinodal decomposition under layer by layer crystal growth condition leads to characteristic quasi-one-dimensional nano-structures in dilute magnetic semiconductors (DMS). It is found that the DMS systems can form rather large clusters with highly anisotropic shape even for low concentrations. It is suggested that the blocking phenomena in the super-paramagnetism, the magnetic dipole-dipole interaction and the network of the one-dimensional structures should be considered to understand the magnetism in DMS. Based on the present simulations, we propose that the delta-doping method can be effective approach to realize high Curie temperature.