稀磁半导体Zn<sub>1-x</sub>Ni<sub>x</sub>O的室温铁磁性-有色金属在线

简介概要

稀磁半导体Zn_1-xNi_xO的室温铁磁性

来源期刊：中国有色金属学报2007年第1期

论文作者：彭坤周灵平胡爱平唐元洪

文章页码：35 - 35

关键词：稀磁半导体；ZnO；铁磁性

Key words：diluted magnetic semiconductor; ZnO; ferromagnetism

摘要：

利用溶胶-凝胶方法制备不同成分的Zn_1-xNi_xO(x=0.05，0.10，0.15)稀磁半导体材料，产物由直径约70 nm的六边形颗粒组成。利用振动样品磁强计测量了样品的磁学性能，发现在室温条件下存在明显的铁磁性，且随着镍浓度的增加，样品的饱和磁化强度增加，但样品的单个镍原子的磁矩是逐渐下降的。X射线衍射分析结果表明，样品中不存在镍及镍的氧化物，且晶格常数随镍含量的增加而略有增大，并利用M—T曲线测量Zn_0.9Ni_0.1O居里温度为575 K左右，表明其磁性来源于稀磁半导体。

Abstract: A series of Zn_1-xNi_xO(x=0.05, 0.10, 0.15) diluted magnetic semiconductors are fabricated by using sol-gel method, and the products consist of hexagonal nanoparticles with about 70 nm in diameter. The measurement of magnetism was carried out by a vibrating samples magnetometer (VSM), it was found that the samples show ferromagnetism under the room temperature, and with the increase of Ni-ion content, the saturated　magnetization increase, but the averaged atomic magnetic moments decrease. The X-ray diffraction results show that there is not any pure nickel or nickel-oxide in the samples and the lattice increases with the content of Ni-ion. It was determined that the Curie temperature of Zn0.9Ni0.1O at about 575 K by M—T curves, which confirmed Zn_1-xNi_xO is ferromagnetism under room-temperature.

基金信息：国家自然科学基金资助项目
湖南省自然科学基金资助项目

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