MnBiDy(Sm)永磁膜的结构和磁性  

STRUCTURE AND MAGNETIC PROPERTIES OF MnBiDy (Sm) PERMANENT MAGNET FILMS

作　　者：方庆清[1] 方瑞宜[2] 张胜[2] 戴道生[2] 

机构地区：[1]安徽省六安师范专科学校 [2]北京大学物理系,北京100871

出　　处：《物理学报》1995年第2期292-298,共7页Acta Physica Sinica

基　　金：国家自然科学基金;中国科学院物理研究所磁学国家重点实验室资助的课题

摘　　要：报道了采用真空蒸镀的方法制备的MnBiDy(Sm)永磁膜的结构和磁性.Mn:Bi:Dy(Sm)的投料比为2:1:0.10.薄膜经过退出处理(350—425℃,保温4h)后,具有NiAs型hcp结构,C轴垂直膜面,剩余磁感应强度B=3.4-6.5kG,内禀矫顽力_MH_c≈3-8kOe,最大磁能积(BH)_(max)=13.39MG·Oe.实验发现,薄膜厚度对MnBiDy(Sm)永磁膜的结构和磁性具有很大的影响.The structure and magnetic properties of MnBiDy (Sm) permanent magnet films, made by vacuum evaporation method, are reported. The initial ratio of the Mn to Bi and Dy (Sm) raw material is 2:1:0.10. After annealing (350-425°C and for 4 hours) the films has the hcp structure with NiAs type, the c-axis is perpendicular to the plane of those films, the remanent magnetic induction Bt≈3.4-6.5 kG, the intrinsic coercivity Hc≈3-8 kOe, the maximum magnetic energy product (BH)max=13.39MG·Oe. It was found that the structure and magnetic properties of MnBiDy (Sm) permanent magnet films were influenced by the film thickness.

关 键 词：MnBiDy(Sm) 永磁膜 结构 磁性 

分 类 号：O482.54[一般工业技术—材料科学与工程] TM273[理学—固体物理]