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物理学报. 1990, 39(1): 154-157.
doi: 10.7498/aps.39.154.
Yb-Ba-Cu(O,F)体系超导电性、点阵常数和热学特性的研究
- 收稿日期: 1989-02-17
- 刊出日期: 2005-03-20
摘要: 本文叙述了Yb-Ba-Cu(O,F)体系超导体的制备,点阵常数、单胞体积以及Tc随F加入量和O含量的变化。实验结果表明,在YbBa2Cu3O7-x-δF2x(0≤x≤1)体系中,O含量越低,Tc越高,点阵常数和单胞体积就越大。晶体结构分析结果证明点阵常数a与b的差值愈大的正交相结构,其超导性能愈好,表明一维Cu-O链结构对高Tc超导机制有重要作用。
English Abstract
THE SUPERCONDUCTIVITY, LATTICE PARAMETER AND THERMAL CHARACTERISTICS OF THE Yb-Ba-Cu(O, F) SYSTEM
- Received Date:
17 February 1989
- Published Online:
20 March 2005
Abstract: 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.
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