Open AccessHIGH PRESSURE SYNTHESIS OF La4Au METASTABLE SUPERCONDUCTING PHASE
Author(s) -
Wenkui Wang,
Shan He,
Zhiyi Liu,
Xiaoke Xu,
WANG SHOU-ZHENG,
Xinming Huang
Publication year - 1983
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.32.1618
Subject(s) - materials science , metastability , superconductivity , orthorhombic crystal system , amorphous solid , quenching (fluorescence) , alloy , high pressure , phase (matter) , condensed matter physics , lattice (music) , amorphous metal , thermodynamics , crystal structure , crystallography , metallurgy , physics , chemistry , optics , quantum mechanics , acoustics , fluorescence
In this puper, we report the synthesis of a new metastable phase La4Au by means of high pressure high temperature treatment of an amorphous alloy. As starting material, the La80Au20 amorphous ribbons were prepared from melt by rapid quenching method. Synthesis conditions were found to be at about 80kbar and 250℃. This new phase has a orthorhombic structure with lattice parameters a = 6.54?, b = 7.71? and c=11.32?, and exhibits superconducting transition at Tc=5.5 K which is higher than that of any known La-Au phases.