磁控溅射Co_(1-x)-Pt_x薄膜晶体的结构与磁性能  

Structure and magnetic properties of sputtered Co_(1-x)-Pt_x monolayer thin films

作　　者：肖娜[1] 杨波[1] 裴文利[1] 赵骧[1] 秦高梧[1] 

机构地区：[1]东北大学材料各向异性与织构教育部重点实验室,沈阳110004

出　　处：《材料与冶金学报》2010年第2期109-112,共4页Journal of Materials and Metallurgy

基　　金：教育部新世纪优秀人才计划;国家自然科学基金(No.50671020);东北大学优秀博士论文资助(No.200904)

摘　　要：通过磁控溅射制备了一系列不同成分的Co-Pt二元合金薄膜,并利用振动样品磁强计（VSM）和X-射线衍射技术（XRD）研究了Pt含量对薄膜磁性能和晶体结构的影响.结果表明：Pt的摩尔分数在0-28.5%范围内,薄膜均为密排六方结构（HCP）;Co-Pt薄膜的晶格常数（c,a）随Pt含量的增加呈线性增大趋势,但其c/a的值却先减小后增大;矫顽力则先增大后减小,在Pt的摩尔分数为20%时达到最大值（156.89 kA/m）;饱和磁化强度随Pt含量的增加而单调减小.In this paper,a series of Co-Pt films with different Pt mole fraction were fabricated by DC magnetron sputtering.The structure and magnetic properties of the films were investigated by X-ray diffraction（XRD） and vibrating sample magnetometer（VSM）,respectively.The results show that all the films are close-packed hexagonal（HCP） structure when the mole fraction of Pt between 0 and 28.5%.Both c and a（lattice parameters of Co-Pt films） increase linearly with increasing the Pt content.The ratios of c/a decrease when Pt mole fraction is up to 20% and then increase afterwards.The coercivities show a trend of increasing first and then decreasing.The maximal coercivity（156.89 kA/m） is obtained in Co80Pt20 thin film.The saturation magnetizations of these films monotonously decrease with Pt content.

关 键 词：Co-Pt合金 磁晶各向异性 晶格常数 

分 类 号：O482.54[一般工业技术—材料科学与工程] O723[理学—固体物理]