L1_0-Fe_(51)Pd_(49)颗粒膜的结构和磁性能  

Structure and Magnetic Properties of L1_0-Fe_(51)Pd_(49) Granular Films

作　　者：刘涛[1] 马垒[1,2] 周良[1] 赵世谦 成钢[1,2] 

机构地区：[1]桂林电子科技大学材料科学与工程学院,广西桂林541004 [2]桂林电子科技大学广西信息材料重点实验室,广西桂林541004

出　　处：《稀有金属》2017年第3期332-336,共5页Chinese Journal of Rare Metals

基　　金：广西自然科学基金项目(2013GXNSFBA019242;2012GXNSFGA060002);广西高校科研项目(YB2014118);广西研究生教育创新计划项目(YCSZ2014140);国家自然科学基金项目(51461012;51261004)资助

摘　　要：采用直流磁控溅射法在石英玻璃基片上制备了Fe_(51)Pd_(49)纳米颗粒膜,将其在500~700℃下进行不同时间的热处理,利用场发射高倍扫描电子显微镜(SEM)、X射线衍射仪(XRD)、振动样品磁强计(VSM)研究了热处理时间、温度对薄膜结构、形貌和磁性能的影响。结果表明,在600℃热处理温度下,随着热处理时间的增加,薄膜由面心立方(fcc)相向面心四方(fct)相转变,fct相的衍射峰逐渐增强,薄膜产生的孔洞随之扩大,膜面由制备态的连续分布转变为不连续的类岛状,并产生了分层,其矫顽力、剩磁比表现出先增大后减小的趋势,最大值分别为0.29 T,0.94。降低热处理温度至550℃,进行3 h的热处理后发现样品也能进行充分的fcc-fct相转变,矫顽力也能达到0.29 T,剩磁比为0.90。本研究有效降低了FePd合金的相转变温度。The L10-Fe51Pd49 nanoparticle films were deposited on glass substrates by direct current magnetron sputtering at room temperature,followed by vacuum annealing at 500 ～ 700 ℃ for different time. The influences of different annealed conditions on the microstructure,morphology and magnetic properties were investigated by X-ray diffraction（ XRD）,scanning electron microscope（ SEM）and vibrating sample magnetometer（ VSM）. The results indicated that the phase transformation occurred from face-centered cubic（ fcc） phase to face centered square（ fct） phase and the diffraction peak intensity of fct phase increased gradually when the films were annealed at 600 ℃ for longer time,associating with the hole enlarging. Surface morphology of FePd films changed from continuous state to island-like state,consequent forming two layers. As a result,the coercivity and remanence ratio increased first and then decreased,which mounted up to 0. 29 T,0. 94,respectively. The almost complete fcc-fct phase transition occurred in the film after annealed at 550 ℃ for 3 h. The coercivity reached up to 0. 29 T and remanence ratio kept about 0. 90. The disorder-order transition temperature evidently reduced in this work.

关 键 词：FePd薄膜 磁记录 磁控溅射 磁性能 

分 类 号：TM27[一般工业技术—材料科学与工程]