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Statistical Studies of the Anisotropy of the Pinning Mechanism in YBaCuO Films Deposited on Polycrystalline YSZ Substrates (2016)
BibTeX
@MISC{Substrates16statisticalstudies,
author = {Polycrystalline Ysz Substrates and Otman Sarrhini and Alain Kreisler and J. Baixeras and A. Kreisler},
title = {Statistical Studies of the Anisotropy of the Pinning Mechanism in YBaCuO Films Deposited on Polycrystalline YSZ Substrates},
year = {2016}
}
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Abstract
Abstract. We have studied the I-V characteristics and the behaviour of the critical current density of Y B a 2 C ~ 3 0 7. ~ films, prepared by sputtering, at different values of applied magnetic field and of temperature. The superconductor was deposited onto polycrystalline Zr02 (8 mol % Y2O3). The I-V characteristics were obtained by using a short current pulse measurement technique in order to avoid heating phenomena. We have used a theoretical model to describe the I-V characteristics, based on a statistical treatment of the motion of vortices in an arbitrary pinning potential. Besides the determination of the critical current density Jc, this model allows to characterise the pinning sites by a function giving their energetic distribution. In this way we have been able to make a clear distinction between intrinsic and extrinsic pinning in sputtered Y B a 2 C ~ 3 0 7. ~ films. 1.
