源于非晶合金的透明磁性半导体

发布时间：2018-06-27 16:00

本文选题：非晶合金 + 磁性半导体　；参考：《物理学报》2017年17期

【摘要】：磁性半导体兼具磁性和半导体特性,通过操控电子自旋,有望实现接近完全的电子极化,提供一种全新的导电方式和器件概念.目前磁性半导体的研究对象主要为稀磁半导体,采用在非磁性半导体中添加过渡族磁性元素使半导体获得内禀磁性的方法进行制备.但大部分稀磁半导体仅具有低温磁性,成为限制其在室温可操控电子器件中应用的瓶颈.针对这一关键科学问题,本文提出与传统稀磁半导体制备方法相反的合成思路,在磁性非晶合金中引入非金属元素诱发金属-半导体转变,使磁性非晶获得半导体电性,研制出具有新奇磁、光、电耦合特性的非晶态浓磁半导体,揭示其载流子调制磁性的内禀机理,发展出可在室温下工作的p-n结及电控磁器件.
[Abstract]:Magnetic semiconductors have both magnetic and semiconductor properties. By controlling electron spin, magnetic semiconductors are expected to achieve near complete electronic polarization and provide a new mode of conduction and device concepts. At present, the main research object of magnetic semiconductors is dilute magnetic semiconductors, which are prepared by adding transition group magnetic elements into non-magnetic semiconductors to obtain intrinsic magnetic properties. However, most diluted magnetic semiconductors have only low temperature magnetic properties, which is the bottleneck of their applications in room temperature controllable electronic devices. In view of this key scientific problem, this paper proposes a synthesis idea contrary to the traditional method of preparation of dilute magnetic semiconductors. The introduction of non-metallic elements in magnetic amorphous alloys induces metal-semiconductor transitions, which makes the magnetic amorphous obtain semiconductor electrical properties. Amorphous dense magnetic semiconductors with novel magnetic, optical and electrical coupling characteristics have been developed to reveal the intrinsic mechanism of carrier modulation magnetism, and to develop p-n junctions and electrically controlled magnetic devices which can work at room temperature.
【作者单位】：清华大学材料学院先进成形制造教育部重点实验室;
【基金】：国家自然科学基金(批准号:51471091)资助的课题~~
【分类号】：TN304.7

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