Ordered arrangements of selective-area grown MnAs clusters as components for planar magneto-electronic devices: Experiment and theory

选择性区域生长的 MnAs 簇的有序排列作为平面磁电子器件的组件：实验和理论

基本信息

批准号：
183471925
负责人：
Professor Dr. Christian Heiliger
金额：
--
依托单位：
I. Physikalisches Institut
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2014-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/183471925?language=en
关键词：
Ordered arrangements selective area grown

项目摘要

The properties of granular hybrid structures, consisting of nanoclusters embedded in a matrix material or arranged on surfaces can be widely tuned. The tuneability arises from the larger number of degrees of freedom in a composite hybrid compared to a single-phase material. However, the technological application of such granular hybrids has been mainly restricted to macroscopic devices, i.e. where the mean distance between clusters is much smaller than the characteristic device size, as most growth methods yield random arrangements of clusters only. Recent progress in selective-area metal-organic vapor phase growth of MnAs clusters on different substrates allows one to accurately tune the position, the size and the shape of ferromagnetic MnAs nanoclusters and, thus, to obtain ordered arrangements of a few nanoclusters which may serve as the starting point for novel planar magnetoelectronic devices. Here, we want to study the magnetic and the magneto-transport properties of individual MnAs clusters as well as of coupled cluster arrangements. The properties of the coupled cluster arrangements can be tuned in a controlled way during the growth process or afterwards by modifying the interface between clusters of the arrangement. Magnetic and magnetotransport results will be correlated and compared with ab initio calculations. On the basis of these results novel device structures will be proposed and preliminary tests will be performed.

可以广泛调节颗粒杂种结构的特性，该粒状结构由嵌入基质材料或排列在表面上的纳米群体组成。与单相材料相比，复合杂种中较大的自由度产生。但是，这种粒状杂种的技术应用主要仅限于宏观设备，即簇之间的平均距离远小于特征设备的大小，因为大多数生长方法仅产生簇的随机排列。 MNA簇在不同底物上的选择性区域金属有机蒸气期的最新进展允许一个人准确调整位置，铁磁MNAS纳米粉的位置，大小和形状作为新型平面磁电机设备的起点。在这里，我们想研究单个MNA簇的磁性和磁传输性能以及耦合群集排列的磁性和磁性特性。可以通过修改布置簇之间的界面来调整耦合群集排列的属性。磁和磁转运结果将与从头算的计算相关。根据这些结果，将提出新型设备结构，并将进行初步测试。