Open AccessSuperconductivity and negative temperature coefficient of the resistivity of bulk metallic glass Zr46.75Ti8.25Cu7.5Ni10Be27.5
Author(s) -
Yong Li,
Wen Ping,
Zhenxing Li,
Xiunian Jing,
Wanlu Wang,
Bai Hai-Yang
Publication year - 2004
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.53.844
Subject(s) - electrical resistivity and conductivity , materials science , amorphous metal , temperature coefficient , superconductivity , condensed matter physics , annealing (glass) , atmospheric temperature range , metal , thermodynamics , metallurgy , composite material , physics , alloy , quantum mechanics
Electrical-resistivity measurements between 1.5 K and 300 K were performed on the Zr46.75Ti8.25Cu7.5Ni10Be27.5 bulk metallic glasses (BMGs) before and after annealing. Results of the superconducting transition temperature measurements are presented for the BMG Zr46.75Ti8.25Cu7.5Ni10Be27.5. The superconducting critical temperature Tc is 1.84K for the as-prepared metallic glassy sample and 3.76K for the annealed sample at zero magnetic fields. The as-prepared metallic glassy sample exhibits negative temperature coefficient of the resistivity in the temperature range from 5 to 300 K. The negative temperature coefficient of the resistivity of the as-prepared metallic glassy sample can be reasonably understood with the extended Faber-Ziman theory in terms of the diffraction model for metallic glasses if it is assumed that Zr, Ti, Cu, Ni and Be contribute 1.5, 1.5, 0.5, 0.5 and 2 conduction electrons, respectively. The R(T) of the BMG Zr46.75Ti8.25Cu7.5Ni10Be27.5 over the temperature range from 5 to 300 K was analyzed by fitting it to a polynomial using a least-squares procedure.