Model of reversible strain dependences of critical current in YBCO-based coated conductors and epitaxial PLD films

Reversible strain dependencies of critical current Jc in YBCO coated conductors and epitaxial PLD films are nonlinear, non-monotonous and have two peaks in a certain range of applied field in a contrary to quasi-linear asymmetric reversible dependence in BiSCO films. We have developed a new theoretical model, which takes into account a twin domain structure of YBCO and the anisotropy of uniaxial strain dependence of T-c. Many experimentally observed effects, such as temperature, magnetic field and two-peak strain dependences of J(c), are shown to be described in the framework of suggested model. (C) 2012 Published by Elsevier B. V. Selection and/or peer-review under responsibility of the Guest Editors.