Effect of dy on structure and magnetic properties of CoPt alloys |
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| Authors: | Gang Cheng Kuang Pang Lei Ma Zhengfei Gu Wei He Guanghui Rao |
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| Affiliation: | 1779. School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, China
2779. Key Laboratory of Nonferrous Metals and New Processing Technology of Materials Ministry of Education, Institute of Materials Science, Guangxi University, Nanning, 530004, China
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| Abstract: | The effects of Dy on the microstructure and magnetic properties of Dy x Co50?x Pt50 alloys were investigated. The XRD results indicate that all the alloys homogenized at 1000 °C contain only a single A1 (fcc) phase, while the alloys annealed at 675 °C consist of a hard-magnetic face-centered-tetragonal (fct) phase and a magnetically soft face-centered-cube (fcc) phase. Maximum values for the coercivity H c and remanence ratio m r were achieved in Dy0.4Co49.6Pt50 alloys annealed at 675 °C for 80 min. For the series of Dy x Co50?x Pt50 alloys annealed at 675 °C for 60 min, H c decreases monotonically with increasing Dy concentration, but m r is first enhanced and then weakened. |
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