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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Volume and Concentration Scaling of Magnetism in Dilute Magnetic Semiconductor Quantum Dots
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Volume and Concentration Scaling of Magnetism in Dilute Magnetic Semiconductor Quantum Dots

机译：稀磁半导体量子点磁力中磁的体积和浓度缩放

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摘要

Investigation of the magnetism of dilute magnetic semiconductors (DMSs) by changing particle dimensionality and doping concentration and its complete understanding is a major step toward their application in multifunctional devices. The importance of effects, such as magnetization reversal with size and magnetic invariance with respect to doping concentration for an appropriate functioning of DMS systems, is empirically well-known. However, explicit demonstration of these effects, specifically in nanomaterials, has so far not been studied mainly due to the lack of synthetic handle. In this work, we have demonstrated the prerequisites of DMS materials by isolating origins of magnetism arising due to clustering of magnetic dopant ions as well as sp-d exchange interaction with the host. We have studied magnetism with varying concentrations of dopant ions and have shown that the magnetism arising due to exchange interaction with the host is invariant up to 10% doping concentration, demonstrating the concentration scaling in DMS systems. Additionally, the study of size-dependent magnetic behavior revealed the effect of domain size and disordered spin on the surface, leading to a change in magnetization/ion as well as magnetization reversal.
机译：通过改变颗粒维度和掺杂浓度的稀释磁半导体（DMS）的磁性研究及其完全理解是朝着多功能设备中应用的重要步骤。效果的重要性，例如磁化反转的尺寸和磁不变相对于掺杂浓度，用于掺杂DMS系统的适当功能，是经验众所周知的。然而，迄今为止，缺乏合成手柄，迄今为止，缺乏纳米材料的显着证明这些效果的显性证明。在这项工作中，我们已经通过隔离由于磁掺杂剂离子的聚类以及与主体的SP-D汇聚互动而分离出现的磁性起源来证明DMS材料的先决条件。我们研究了具有不同掺杂剂离子的磁性，并且已经表明由于与宿主交换相互作用而产生的磁性最高可达10％的掺杂浓度，证明了DMS系统中的浓度缩放。另外，大小依赖性磁性的研究显示了畴尺寸和旋转在表面上的旋转效果，导致磁化/离子的变化以及磁化反转。

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