水热法合成Zn_(1-x)Co_xO室温稀磁半导体  

Hydrothermal Synthesis of Zn_(1-x) Co_xO Room Temperature DMS

作　　者：韦志仁[1] 刘超[1] 李军[1] 林琳[1] 郑一博[1] 葛世艳[1] 张华伟[1] 窦军红 

机构地区：[1]河北大学物理科学与技术学院,保定071002

出　　处：《人工晶体学报》2006年第3期484-487,共4页Journal of Synthetic Crystals

基　　金：国家自然科学基金(No.50472037);河北省自然科学基金(E2004000117;F2004000130);河北省科技攻关;河北省教育厅资助项目(No.2002158)

摘　　要：本文采用水热法,在430℃,填充度为35%,3mol/L KOH作为矿化剂,反应时间为24h,合成了Zn1-xCoxO晶体。当在Zn(OH)2中添加一定量的CoC l2.6H2O为前驱物时,水热反应产物中,可以获得多晶体形态的掺杂Zn1-xCoxO晶体。电子探针测量表明,随着前驱物中CoC l2.6H2O添加量的增加,晶体中的Co实际掺入量也随着增加。采用超导量子干涉磁强仪测量材料的磁性,发现在室温以下,水热法合成的Zn1-xCoxO晶体的磁化强度随温度变化很小,在300K存在明显的磁饱和现象和磁滞回线,表明具有室温下铁磁性。Zn1-xCoxO crystals were synthesized by hydrothermal method with 3mol/L KOH as mineralizer. The fill factor was 35%, reaction temperature, 430℃ and reaction time, 24 hours. When the Zn（ OH）2 doped with CoCl2 · 6H2O was used as precursor, many different shapes of Zn1-x Cox O crystals were obtained in the hydrothermal synthesis products. The Co concentration in the crystal was determined by electron probe, the atomic percentage of Co in the crystal increased as the concentration of CoCl2 · 6H2O in precursor increased. The measurement of magnetism was carried out by using a superconducting quantum interference device （SQUID）. It is found that the magnetization varies unobviously as the temperature rises below the room temperature. The hysteresis loop of Zn1-xCox O crystals was obtained at 300K and shows the ferromagnetism at the room temperature.

关 键 词：水热合成 氧化锌 矿化剂 稀磁半导体 晶体 

分 类 号：O471[理学—半导体物理]