氧分压对Zn_(0.99)Mn_(0.01)O稀磁薄膜结构和磁学特性的影响  

Influence of Oxygen Partical Pressure on the Structure and Magnetic Properties of Zn_(0.99)Mn_(0.01)O Diluted Magnetic Films

作　　者：于威[1] 陈明敬[1] 高卫[1] 滕晓云[1] 傅广生[1] 

机构地区：[1]河北大学物理科学与技术学院,河北保定071002

出　　处：《河北大学学报（自然科学版）》2011年第2期135-140,共6页Journal of Hebei University(Natural Science Edition)

基　　金：河北省自然科学基金资助项目(E2006001006);河北大学自然科学基金资助项目(2008-127)

摘　　要：采用脉冲激光沉积技术在Al2O3衬底上制备了Mn掺杂的ZnO稀磁薄膜.通过不同氧压下所制备样品的微观结构、光学性质和铁磁特性分析,研究了氧分压对Zn0.99Mn0.01O稀磁薄膜微观结构和磁学特性的影响.结果表明,所沉积薄膜均具有良好的c轴择优取向.在氧分压为5 Pa时得到的(002)衍射峰半高宽最小,但薄膜的室温铁磁性随着氧分压的增加而增大.分析认为,Mn掺杂引起的锌空位可能诱导了Zn0.99Mn0.01O薄膜的室温铁磁性.Manganese（Mn） doped ZnO films are grown on sapphire substrates by pulsed laser deposition technique.We systematically studied the influence of oxygen partical pressure on the microstructure and magnetic properties of Zn0.99Mn0.01O diluted magnetic films by analysising the microstructure,optical properties and magnetic properties of the sample which were deposited at various oxygen pressure.Experimental results demonstrated that the deposited films had good c-axis preferred orientation.When oxygen partial pressure was 5 Pa,we observed full width at half maximum of（002） diffraction peaks was the minimum,but room temperature ferromagnetism（RTFM） of the films increased with the increasing of oxygen pressure.It is suggested that zinc vacancy caused by Mn doping may induce RTFM of Zn0.99Mn0.01O film.

关 键 词：ZnO稀磁薄膜 室温铁磁性 脉冲激光沉积 

分 类 号：O484[理学—固体物理]