Magnetic properties of melt-spun Sm(Co0.9Fe0.1)6.8Zr0.2Cx ribbons with TbCu7 structure

We have investigated the effect of carbon addition on the structure and magnetic properties of melt-spun Sm(Co0.9Fe0.1)(6.8)Zr0.2Cx (X = 0, 0.03, 0.06, 0.09 and 0.12) ribbons. The samples mainly have a single TbCu7 structure. The added carbon helps formation of a microstructure with fine and homogeneous grains. A coercivity, H-i(c), of 11.3 kOe and a maximum energy product, (BH)(max), of 6.8 MG Oe have been obtained for ribbons with x = 0 at a wheel speed of 40 in s(-1); a H-i(c) of 14.3 kOe and a (BH)(max) Of 10.9 MG Oe are achieved for ribbons with x = 0.06.

[1]  Y. Liu,et al.  Nanocrystalline Sm12.5(Co,Zr)87.5 magnets: synthesis and magnetic properties , 2002 .

[2]  D. Sellmyer,et al.  Magnetic and structural properties of SmCo7-xCux alloys , 2000 .

[3]  J. Liu,et al.  Structure and magnetic properties of SmCo7−xTix with TbCu7-type structure , 2000 .

[4]  D. Sellmyer,et al.  Magnetic and structural properties of SmCo6.75−xFexZr0.25 compounds , 2000 .

[5]  S. Bauer,et al.  Large piezoelectric effects in charged, heterogeneous fluoropolymer electrets , 2000 .

[6]  G. Hadjipanayis.  Nanophase hard magnets , 1999 .

[7]  T. Chin,et al.  Intergrain exchange coupling and coercivity mechanism of nanocrystalline Sm2Fe15-xCuxSi2C (x=0 and 1) ribbons prepared by melt spinning , 1999 .

[8]  M. McHenry,et al.  Structure and magnetic properties of SmCo7−xZrx alloys (x=0–0.8) , 1998 .

[9]  B. Shen,et al.  Permanent magnetic properties of melt-spun , 1997 .

[10]  T. Chin,et al.  Magnetic properties of microcrystalline SmCo/sub x/ alloys by melt spinning , 1996 .

[11]  C. Fuerst,et al.  Melt‐spun PrCo5 and related magnet materials: Coercivity enhancement by carbon addition , 1993 .

[12]  F. D. Boer,et al.  Magnetic and crystallographic characteristics of rare-earth ternary carbides derived from R2Fe17 compounds , 1990 .

[13]  H. Saito,et al.  Magnetocrystalline anisotropy for Sm2(Co-Mn)17 compound with TbCu7 type disordered structure , 1989 .

[14]  K. Strnat,et al.  Demagnetization curves of four rare‐earth‐cobalt magnet types at temperatures 300–1000 K , 1982 .