Effect of Dy on Structure and Magnetic Properties of CoPt Alloys

• 作 者: 成钢 PANG Kuang MA Lei GU Zhengfei HE Wei RAO Guanghui
• 机 构: School of Materials Science and Engineering, Guilin University of Electronic Technology,Key Laborato
• 出 处: Journal of Wuhan University of Technology(Materials Science
• 发表日期: 2013年04期
• 关键词: annealed coercivity tetragonal centered annealing ordering cube anisotropy vibra

The effects of Dy on the microstructure and magnetic properties of DyxCo50-xPt50 alloys were investigated. The XRD results indicate that all the alloys homogenized at 1000 ℃ contain only a single A1 (fcc) phase, while the alloys annealed at 675 ℃ consist of a hard-magnetic face-centered-tetragonal (fct) phase and a magnetically soft face-centered-cube (fcc) phase. Maximum values for the coercivity Hc and remanence ratio mr were achieved in Dy0.4Co49.6Pt50 alloys annealed at 675 ℃ for 80 min. For the series of DyxCo50-xPt50 alloys annealed at 675 ℃ for 60 min, Hc decreases monotonically with increasing Dy concentration, but mr is first enhanced and then weakened.

The effects of Dy on the microstructure and magnetic properties of DyxCo50-xPt50 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 Hc and remanence ratio mr were achieved in Dy0.4Co49.6Pt50 alloys annealed at 675 ° C for 80 min. For the series of DyxCo50-xPt50 alloys annealed at 675 ° C for 60 min, Hc decreases monotonically with increasing Dy concentration, but mr is first enhanced and then weakened.