Magnetic properties of Nd2(Fe1-xMx)14B(M=C, Si) alloys

Substituting Fe by a small amount of metalloid C and Si atoms, the compounds are in tetragonal structure and have uniaxial anisotropy. The substitution of C for part of Fe makes the Curie temperature and intrinsic coercivity of bond samples decrease at low temperature. The replacement of Fe by Si makes the Curie temperature increase with a maximum at the vicinity of x=0.15. When the range of the Si is 0&lex&le0.10, the coercivity increases at room temperature from 62.7 kA/m at x=0 to 138.7 kA/m at x=0.06, where the residual magnetization has a maximum. At the same time the saturation magnetization decreases by a small amount.EI05B348-B3522