Artificial pinning in thick YBCO films: Pinning potential and c-axis correlation

被引：3

作者：

Crisan, Adrian ^{[1
,2
]}

Mikheenko, Pavlo ^{[1
]}

Sarkar, Asis ^{[1
]}

Dang, Van Son ^{[1
]}

Kechik, Mohammed M. Awang ^{[1
]}

Abell, John S. ^{[1
]}

Paturi, Petriina ^{[3
]}

Huhtinen, Hannu ^{[3
]}

机构：

[1] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England

[2] Natl Inst Mat Phys, Bucharest 077125, Romania

[3] Univ Turku, Dept Phys & Astron, Wihuri Phys Lab, FI-20014 Turku, Finland

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2010年 / 470卷 / 19期

关键词：

YBCO films; Artificial pinning centres; FLUX; SUPERCONDUCTOR;

D O I：

10.1016/j.physc.2010.02.033

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have introduced artificial pinning centres in thick (>1 mu m) YBCO films grown by Pulsed Laser Deposition using substrate decoration, quasi-multilayers, and target doping approaches. We have found that the frequency dependence of critical current density is consistent with a logarithmic dependence of pinning potential on current density. For most of materials used as nano-dots, artificially-induced pinning centres have a larger potential than natural ones. From angle-dependent in-field transport measurements and from Transmission Electron Microscopy we have found evidence of c-axis correlated pinning centres. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：840 / 843

页数：4

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