Magnetic properties, phase evolution, and microstructure of melt-spun (Sm{sub 1-x}Pr{sub x})Co{sub 7-y}Hf{sub y}C{sub z} (x=0-1; y=0.1-0.3; z=0-0.14) ribbons
- Department of Physics, National Chung Cheng University, Taiwan Institute of Physics, Academia Sinica, Taipei, Taiwan (China)
Magnetic properties, phase evolution, and microstructure of melt-spun (Sm{sub 1-x}Pr{sub x})Co{sub 7-y}Hf{sub y}C{sub z} ribbons have been investigated. For (Sm{sub 1-x}Pr{sub x})Co{sub 7-y}Hf{sub y} (x=0-1; y=0.1-0.3) ribbons, the magnetization increases, but coercivity decreases, with increasing Pr content. However, the phase constitution and microstructure have not been influenced by modifying Pr content x. The attractive magnetic properties of B{sub r}=6.5 kG, {sub i}H{sub c}=6.1 kOe, and (BH){sub max}=7.2 MG Oe could be obtained for (Sm{sub 0.8}Pr{sub 0.2})Co{sub 6.9}Hf{sub 0.1} ribbons. A slight addition of C in (Sm{sub 0.8}Pr{sub 0.2})Co{sub 6.9}Hf{sub 0.1}C{sub z} (z=0.06-0.14) ribbon not only refines the microstructure, but also induces nanoscale fcc-Co precipitation in the matrix, leading to the stronger exchange-coupling effect between magnetic grains and the enhancement of remanence and magnetic energy product. As a result, the improved magnetic properties of B{sub r}=7.1 kOe, {sub i}H{sub c}=8.5 kOe, and (BH){sub max}=11.2 MG Oe can be achieved for (Sm{sub 0.8}Pr{sub 0.2})Co{sub 6.9}Hf{sub 0.1}C{sub 0.12} ribbons.
- OSTI ID:
- 21137318
- Journal Information:
- Journal of Applied Physics, Vol. 103, Issue 7; Conference: 52. annual conference on magnetism and magnetic materials, Tampa, FL (United States), 5-9 Nov 2007; Other Information: DOI: 10.1063/1.2829399; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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