COEXISTENCE OF SPIN-GLASS AND TYPE-II CERAMIC SUPERCONDUCTIVITY

被引:0
|
作者
ALLUB, R [1 ]
CHELAFLORES, J [1 ]
机构
[1] INT CTR THEORET PHYS, I-34100 TRIESTE, ITALY
关键词
Spin glass; type-II superconductivity;
D O I
10.1080/01411599008207215
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
The new magnetic phase which has been observed recently in La2- x Bax CuO4 at low temperatures for small concentrations of Ba, is studied in a phenomenological approach in which the superconducting (SC) and spin-glass (SG) phases are assumed to coexit. We construct the free energy in terms of two order parameters under the following assumptions: it must be a scalar; the theory must be gauge invariant; and simplicity (i.e. the standard assumptions in a Lagrangian formalism). We are thus induced from recent experiments to the conclusion that the SG ordering enhances the SC ordering and vice versa. © 1990, Taylor & Francis Group, LLC. All rights reserved.
引用
收藏
页码:63 / 68
页数:6
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