Co_xAg_(100-x)颗粒膜的巨磁电阻效应及其物理机制研究  

STUDY ON THE GMR EFFECT OF Co_xAg_(100-x) GRANULAR FILMS AND ITS PHYSICAL MECHANISM

作　　者：严健生[1] 沈鸿烈[1] 沈勤我[1] 周祖尧[1] 邹世昌[1] 

机构地区：[1]中国科学院上海冶金研究所信息功能材料国家重点实验室

出　　处：《功能材料与器件学报》1998年第1期41-46,共6页Journal of Functional Materials and Devices

基　　金：上海市应用材料研究发展基金

摘　　要：用超高真空电子束蒸发沉积方法制备了ＣｏｘＡｇ１００－ｘ颗粒并研究了其中的巨磁电阻（ＧＭＲ）效应。实验结果表明：１５ｋＯｅ外磁场下，玻璃衬底上制备态Ｃｏ３９Ａｇ６１颗粒膜室温ＧＭＲ效应值高达２０２％，并随氮气中退火温度上升而单调减小；颗粒膜的电阻与其磁化强度直接相关，可用四次多项式偶函数来描述。o_xAg_(100-x) granular films were grown on the substrates of glass and silicon using the UHV electron beam evaporation system It was found that at room temperature the giant magnetoresistance (GMR) value of the asdeposited Co_39Ag_61 granular film on the glass substrate was as large as 202% under an applied magnetic field of 15 kOe and GMR value decreased monotonously with increasing annealing temperature in N_2 The magnetoresistance of a granular film could be described in a fourth order polynomial even function of its magnetization

关 键 词：颗粒膜 巨磁电阻效应 电子束蒸发 

分 类 号：O484[理学—固体物理]