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Articles you may be interested inMagnetic properties and crystal structure of melt-spun Sm(Co, M)7 (M=Al and Si) ribbons J. Appl. Phys. 111, 07E306 (2012); 10.1063/1.3671429 Effect of Ge on the magnetic properties and crystal structure of melt spun SmCo7-xGex ribbons J. Appl. Phys. 109, 07A730 (2011); 10.1063/1.3562451 Magnetic properties, phase evolution, and microstructure of melt spun Sm ( Co , M ) x C y ( M = Hf and Zr; x = 5 -9 ; y = 0 -0.15 ) ribbons J. Appl. Phys. 107, 09A710 (2010); 10.1063/1.3337575 Crystal structure and magnetic properties of melt spun Sm ( Co , V ) 7 ribbonsMagnetic properties, phase evolution, and microstructure of melt spun SmCo 7−x Hf x C y ͑x = 0 -0.5; y = 0 -0.14͒ ribbons via direct quenching have been investigated. For SmCo 7−x Hf x series ribbons, proper volume fraction of Hf is effective to stabilize and increase the magnetocrystalline anisotropy field of the TbCu 7 -type structure. Accordingly, the optimal magnetic properties of B r = 6.4 kG, i H c = 7.3 kOe, and ͑BH͒ max = 8.7 MG Oe could be obtained for x = 0.1. Furthermore, a slight C addition to above alloys is helpful in refining the grain size of the ribbons from 100-400 nm for C-free to 10-80 nm for C-containing samples. As a result, the magnetic properties are further improved to B r = 6.9 kG, i H c = 11.8 kOe, and ͑BH͒ max = 10.6 MG Oe for SmCo 6.8 Hf 0.2 C 0.12 nanocomposite ribbons.

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