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Co-Pt-C颗粒膜的磁性
引用本文:郑鹉,王艾玲,姜宏伟,周云松,李彤.Co-Pt-C颗粒膜的磁性[J].物理学报,2004,53(8):2761-2765.
作者姓名:郑鹉  王艾玲  姜宏伟  周云松  李彤
作者单位:首都师范大学物理系,北京 100037
基金项目:国家自然科学基金(批准号:50071038)和北京市教育委员会发展基金资助的课题.
摘    要:利用磁控溅射方法制备多层膜后,再经热处理得到Co-Pt-C颗粒膜.热处理使Co-Pt颗粒从非晶相转向fcc CoPt3和fct CoPt稳定有序相,C则保持非晶态.Pt成分占Co,Pt总体积的70%时,膜的矫顽力Hc可超过400?kA/m.C插层厚度为0.2—0.6nm时,Hc最大,且在磁滞回线上出现“肩膀”.分析认为这是由于存在两个磁性不同的Co-Pt晶相,受C成分比的影响,使它们之间的耦合性质和强度不同造成的. 关键词: Co Pt C 磁滞回线 颗粒膜

关 键 词:Co  Pt  C  磁滞回线  颗粒膜
文章编号:1000-3290/2004/53(08)/2761-05
收稿时间:2003-10-28

Magnetic properties of Co-Pt-C grain films
Zheng Wu,Wang Ai-Ling,Jiang Hong-Wei,Zhou Yun-Song and Li Tong.Magnetic properties of Co-Pt-C grain films[J].Acta Physica Sinica,2004,53(8):2761-2765.
Authors:Zheng Wu  Wang Ai-Ling  Jiang Hong-Wei  Zhou Yun-Song and Li Tong
Abstract:Co-Pt-C grain films with in plan magnetic anisotropy and large coercivity Hc were prepared by sputtering on Si substrates in multilayer form,with post-annealing in vacuum at 700℃ for 1?h. After annealing, Co-Pt particles trans form from amorphous to fcc CoPt3 and fct CoPt, and C remains in disorder state. Effects of Pt and C concentration on the magnetic properties of the films are studied. The maximum Hc is 430kA/m when the content of Pt is 70 vol% and the thickness of C layer is 0.4nm. The shoulder developed on the hysteresis loop is analyzed.
Keywords: cobalt platinum carbon hysteresis loop grain film
Keywords:cobalt  platinum  carbon  hysteresis loop  grain film
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