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中国物理学会期刊

非晶态Fe87-xSixB13合金的磁化强度、电阻与温度的关系

CSTR: 32037.14.aps.34.1009

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

CSTR: 32037.14.aps.34.1009
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  • 本文研究了非晶态Fe87-xSixB13(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TC和晶化温度Tcr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T3/2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

     

    The magnetization and eleetrcal resistivity as a function of temperature for amorphous Fe87-xSixB13 (x=0, 9.6, 14.5) alloys were studied. It is obtained that Curie temperature Tc and crystalline temperature Tcr increases markly with increasing Si content. The temperature dependence of magnetization at low temperature is in accordance with Bloch T3/2 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 Tmin 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 Tmin≤T≤130K, respectively. A discussion of this phenomenon is given in terms of a generalized Ziman theory.

     

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