BN及Ag对FePt薄膜结构和磁性的影响  

Effects of BN and Ag on FePt Thin Films with Microstructures and Magnetic Properties

作　　者：范九萍[1] 江凤仙[1] 吕宝华[1] 

机构地区：[1]山西师范大学化学与材料科学学院,山西临汾041004

出　　处：《中北大学学报（自然科学版）》2009年第4期315-319,共5页Journal of North University of China(Natural Science Edition)

基　　金：国家自然科学基金资助项目(10574085)

摘　　要：采用磁控溅射在玻璃基片上制备了BN/FePt/Ag薄膜,并在550℃真空退火30 min.用振动样品磁强计和X射线衍射仪研究了薄膜的磁特性和微观结构.结果表明:BN的厚度影响了BN/FePt/Ag薄膜的有序度和矫顽力,而且BN的添加有效地抑制了FePt粒子的长大,较薄的BN更有利于FePt由FCC向FCT相转变.此外,Ag的位置对提高[BN/FePt]5/Ag薄膜的垂直取向有一定的影响,总厚度为3.75 nm的Ag掺杂在BN与FePt之间要比在顶层更利于FePt垂直取向.BN/FePt/Ag thin films were deposited by magnetron sputtering on the glass substrates, then annealed at 550 C for 30 min in vacuum. The vibrating sample magnetometer and the X-ray diffraction meter were applied to study the magnetic properties and microstructures of the films. Results indicate that BN-doping plays an important role in improving the order parameter and the coercivity, the addition of BN reduces the grain size efficiently, and the thinner BN is more beneficial for phase transformation of FePt from FCC to FCT. In addition, it is found that the location of Ag can affect the improvement of perpendicular orientation in the [BN/FePt]s/Ag thin films. It is easier for perpendicular orientation in FePt films when Ag with the thickness of 3.75 nm is located between FePt and BN rather than in top layer.

关 键 词：BN/FePt多层膜 垂直取向 磁控溅射 矫顽力 

分 类 号：O614[理学—无机化学]