非晶态Fe87-xSixB13合金的磁化强度、电阻与温度的关系

本文研究了非晶态Fe_87-xSi_xB₁₃(x=0,9.6,14.5)合金的饱和磁化强度、电阻率与温度的关系。得到样品的居里温度T_C和晶化温度T_cr随Si含量的增加而明显提高。低温下的热磁关系符合布洛赫的T^3/2定律,计算出自旋波劲度系数D从x=0时的62meV·A²增加到x=14.5时的111meV·A²。从D值和Handrich理关键词：

TEMPERATURE DEPENDENCE OF THE MAGNETIZATION AND ELECTRICAL RESISTIVITY FOR AMORPHOUS Fe87-xSixB13 ALLOYS

The magnetization and eleetrcal resistivity as a function of temperature for amorphous Fe_87-xSi_xB₁₃ (x=0, 9.6, 14.5) alloys were studied. It is obtained that Curie temperature T_c and crystalline temperature T_cr increases markly with increasing Si content. The temperature dependence of magnetization at low temperature is in accordance with Bloch T^3/2 law. Calculation shows that the spin wave stiffness constant D increases with increasing Si content from 62meV·A² to 111 meV·A² δ=〈△J〉^1/2/〈J〉 value obtained from D is close to that calculated by Handrich theory. The resistivity minima phenomena have been observed at low temperature for x=0, 9.6 and 14.5. The temperature of resistivity minima T_min increases with increasing Si content from 10.5K for x=0 to 24.6 K for x=14.5. The temperature dependence of the resistivity are linear and quadratic near room temperature and in the range T_min≤T≤130K, respectively. A discussion of this phenomenon is given in terms of a generalized Ziman theory.