Open AccessTHE SUPERCONDUCTIVITY, LATTICE PARAMETER AND THERMAL CHARACTERISTICS OF THE Yb-Ba-Cu(O, F) SYSTEM
Author(s) -
张玉苓,
梁敬魁,
饶光辉,
成向荣,
李克胜,
雷翎,
郑东宁,
解思深
Publication year - 1990
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.39.154
Subject(s) - lattice constant , orthorhombic crystal system , superconductivity , lattice (music) , materials science , oxygen , condensed matter physics , crystal structure , crystallography , physics , chemistry , diffraction , quantum mechanics , acoustics , optics
Superconductive samples with compositions of YbBa2Cu3F2xO7-x-δ (0≤x≤1) have been prepared. The variations of Tc, lattice constants and cell volume with the fluorine dose have been described. We report an experimental observation of an increase of Tc with a decrease of the oxygen content in the YbBa2Cu3F2xO7-x-δ (0 ≤x≤1). Therefore with the content of oxygen increasing, the lattice constants and cell volume of the superconducter become larger. The higher Tc, the larger is the velue of lattice constants (b-a) of the orthorhombic structure. It has been shown that the M-Cu-O or Cu-O part of the systems may have an essential role or the superconductivity.