Electrical resistivity and thermopower of amorphous FexCo80−xB20 alloys

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Abstract
A systematic study of the electrical resistivity ρ and thermopower S of amorphous FexCo80−xB20 alloys in the temperature range 4 Ksd. The calculation of 2kF values from the experimental data according to the outlined transport model explicitly shows its limitation. The thermopower S is not linear over any large range of temperature contrary to the prediction of a pure structural transport model. The thermal behavior and the variation of the room temperature values of S with x is similar to that observed in crystalline Fe–Ni alloys. It is argued that the extension of Kasuya’s relation based upon the s–d exchange interaction model should provide an approximate description of the temperature dependence S of ferromagnetic amorphous alloys.