本文研究了Nd_2(Fe_(1-x)M_x)_(14)B的磁性。少量类金属原子C和Si取代部分Fe,能形成四方结构,且具有单轴各向异性。碳取代Fe,使化合物的Curie温度降低,低温下粘结体样品的内禀矫顽力减少;而Si对Fe的取代可使Curie温度升高,并在x=0.15附近达到极大值。含Si样品在0≤x≤0.10范围内,矫顽力显著增加,室温下从x=0的62.7kA/m增加到x=0.06的138.7 kA/m,并且在x=0.06附近,剩磁有一个极值,饱和磁化强度减少不多。
The magnetic properties of Nd_2(Fe_(1-x)M_x)_(14)B (M=C, Si) compoundshave been investigated. Substituting Fe by a small amount of metalloid C and Siatoms, the compounds are in tetragonal structure and have uniaxial anisotropy. Thesubstitution of C for part of Fe makes the Curie temperature and the intrinsic coer-civity of bond samples decrease at low temperature. The replacement of Fe by Simakes the Curie temperature increase with a maximum at the vicinity of x=0. 15.When the range of the content of Si is 0≤x≤0.10, the coercivity distinctly in-creases at room temperature, from 62.7 kA/m at x=0 to 138.7kA/m at x=0.06, wherethe residual magnetization has a maximum; at the mean time the saturation magne-tization decreases only by a small amount.
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