摘要
利用溶胶-凝胶方法制备不同成分的Zn1?xNixO(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Zn0.9Ni0.1O居里温度为575 K左右,表明其磁性来源于稀磁半导体。
A series of Zn1-xNixO（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 575K by M-T curves, which confirmed Zn1-xNixO is ferromagnetism under room-temperature.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2007年第1期35-38,共4页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(50501008)
湖南省自然科学基金资助项目(04jj3010)
关键词
稀磁半导体
ZNO
铁磁性
diluted magnetic semiconductor
ZnO
ferromagnetism
作者简介
通讯作者：彭坤，副教授；电话：0731-8821778：E—mail：kpeng@hnu.cn
