Microstructures and Magnetic Properties of CoPt-C Nanogranular Films

摘要：

　　CoPt-C films were fabricated on silicon substrate by dc reactive magnetron sputtering followed by vacuum annealing.The effects of C additions and annealing temperature on the microstructure and magnetic properties were investigated.The as-deposited films had flat, compact surfaces and face-centered cubic structure, which transforms into the face-centered tetragonal structure after thermal annealing at 700℃ for 1 hour.The grain size of CoPt increased with the annealing temperature but decreased with increasing C content.No carbide appearing, the C content exists in amorphous state in the nanocomposite films, and it is homogeneous distributed between the CoPt nano-grains, which have the benefit to restrain grain growth and obtain isolated CoPt particles with uniform size.The fct-CoPt films annealed at 700℃ exhibited high in-plane coercivity, up to 4200 Oe at room temperature and better square degrees.In the CoPt-C granular films, the best doping amount is about 35 at.% C.These CoPt-C films with novel embedded structure and moderate coercivity have shown promise for high density magnetic recording medium.

关键词： CoPt thin films Magnetic recording Magnetron sputtering

作者: Lei Ma Mu-fen He Gang Cheng Zheng-fei Gu

作者单位: School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China;Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China

会议类型: 国际会议

会议名称: The 2016 China Functional Materials Technology and Industry Forum (2016中国国际功能材料大会暨第九届中国功能材料及其应用学术会议)

会议地点: 重庆

会议语种:英文

页码: 985-990

在线出版日期: 2016-07-25（万方平台首次上网日期，不代表论文的发表时间）