Abstract
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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