本文選題：非晶合金 + 磁性半導(dǎo)體　； 參考：《物理學(xué)報(bào)》2017年17期

【摘要】：磁性半導(dǎo)體兼具磁性和半導(dǎo)體特性,通過(guò)操控電子自旋,有望實(shí)現(xiàn)接近完全的電子極化,提供一種全新的導(dǎo)電方式和器件概念.目前磁性半導(dǎo)體的研究對(duì)象主要為稀磁半導(dǎo)體,采用在非磁性半導(dǎo)體中添加過(guò)渡族磁性元素使半導(dǎo)體獲得內(nèi)稟磁性的方法進(jìn)行制備.但大部分稀磁半導(dǎo)體僅具有低溫磁性,成為限制其在室溫可操控電子器件中應(yīng)用的瓶頸.針對(duì)這一關(guān)鍵科學(xué)問(wèn)題,本文提出與傳統(tǒng)稀磁半導(dǎo)體制備方法相反的合成思路,在磁性非晶合金中引入非金屬元素誘發(fā)金屬-半導(dǎo)體轉(zhuǎn)變,使磁性非晶獲得半導(dǎo)體電性,研制出具有新奇磁、光、電耦合特性的非晶態(tài)濃磁半導(dǎo)體,揭示其載流子調(diào)制磁性的內(nèi)稟機(jī)理,發(fā)展出可在室溫下工作的p-n結(jié)及電控磁器件.
[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.
【作者單位】： 清華大學(xué)材料學(xué)院先進(jìn)成形制造教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(批準(zhǔn)號(hào):51471091)資助的課題~~
【分類號(hào)】：TN304.7

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