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近年来一类新的半导体合金:稀释磁性(或半磁性)半导体引起人们的极大关注。稀释磁性半导体(DMS)是一种合金材料,它们的晶格含有取代的磁性离子,例如CdMnTe(在主晶CdTe中一小部分Cd原子由一种磁性离子(Mn)任意取代)。对这些材料感兴趣的原因有三:1.DMS的特性(能隙、晶格参数等)可加以仔细修整。例如不透明半导体CdTe当愈来愈多的Cd原子被Mn取代时逐渐变得透明。2.显出极端有趣的磁性。例如在低温下
In recent years, a new class of semiconductor alloys: dilute magnetic (or semi-magnetic) semiconductor aroused great concern. Diluted magnetic semiconductors (DMS) are alloy materials whose lattices contain substituted magnetic ions such as CdMnTe (a small fraction of the Cd atoms in the main crystalline CdTe are optionally replaced with a magnetic ion (Mn)). There are three reasons for the interest in these materials: 1. The characteristics of the DMS (energy gap, lattice parameters, etc.) can be carefully trimmed. For example, opaque semiconductor CdTe gradually becomes more transparent as more and more Cd atoms are replaced by Mn. Show the extremely interesting magnetic. For example at low temperatures