Original scientific paper
Electrical and magnetic properties of amorphous Zr100 - x Cux alloys
Ramir Ristić
; Institut za fiziku Sveučilišta, 41000 Zagreb, Yugoslavia
Emil Babić
; Institut za fiziku Sveučilišta, 41000 Zagreb, Yugoslavia
Krešimir Šaub
; Institut za fiziku Sveučilišta, 41000 Zagreb, Yugoslavia
Marko Miljak
; Institut za fiziku Sveučilišta, 41000 Zagreb, Yugoslavia
Abstract
The electrical resistivities and magnetic susceptibilities of seven amorphous Zr100 - x Cux alloys (26 < x < 71) have been measured. A rather strong almost linear decrease of the Pauli like magnetic susceptibility with x is observed indicating that the electronic density of states at the Fermi level is dominated by Zr d-states in these alloys. Moreover these results can be simply explained by the dilution effect due to increasing Cu content. Their resistivities are high ( > 160 µΩ cm) and follow approximately the Nordheim rule with the maximum around x = 60. The resistivities of all alloys decrease continuously with temperature between 4.2 K and 300 K. The relative change in resistivity is bigger for the alloys with the lower Cu content. At low temperatures (but above the superconducting transition temperature, Tc < 4 K) their resistivities vary approximately as - T2 and around room temperature a linear decrease of resistivity is observed. By the use of experimental structure factors the resistivities and the temperature coefficients of resistivity for three alloys (within our concentration range) have been calculated within the framework of Ziman's theory for liquid alloys. The comparison of the calculated and measured quantities shows that the above theory is not applicable to amorphous Zr-Cu alloys.
Keywords
Hrčak ID:
328933
URI
Publication date:
5.12.1983.
Visits: 379 *