Increased flux pinning in YBa2Cu3O7-δ thin-film devices through embedding of Au nano crystals

被引：10

作者：

Katzer, C. ^{[1
]}

Schmidt, M. ^{[1
]}

Michalowski, P. ^{[1
]}

Kuhwald, D. ^{[1
]}

Schmidl, F. ^{[1
]}

Grosse, V. ^{[1
]}

Treiber, S. ^{[2
]}

Stahl, C. ^{[2
]}

Albrecht, J. ^{[3
]}

Huebner, U. ^{[4
]}

Undisz, A. ^{[5
]}

Rettenmayr, M. ^{[5
]}

Schuetz, G.

Seidel, P. ^{[1
]}

机构：

[1] Univ Jena, Inst Festkorperphys, D-07743 Jena, Germany

[2] Max Planck Inst Intelligente Syst, D-70569 Stuttgart, Germany

[3] Hsch Aalen, D-73430 Aalen, Germany

[4] Inst Photon Technol, D-07745 Jena, Germany

[5] Univ Jena, Inst Mat Wissensch & Werkstofftechnol, D-07743 Jena, Germany

来源：

EPL | 2011年 / 95卷 / 06期

关键词：

PLANAR SQUID GRADIOMETERS; LOW-NOISE;

D O I：

10.1209/0295-5075/95/68005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We prepared direct-current superconducting quantum interference device (dc-SQUID) gradiometers consisting of a single YBa2Cu3O7-delta (YBCO) layer on SrTiO3 (STO) bicrystal substrates. The superconducting thin film was modified by embedding crystalline gold nanoparticles. We investigated the growth conditions of these particles as well as their influence on the properties of the YBCO thin film. In our magneto-optical measurements we found that the presence of embedded nano crystals results in a distinct enhancement of j(c) over the whole investigated temperature range. We attribute the higher critical current density to an increased pinning, which also results in a reduction of the flux noise of our investigated gradiometers. Copyright (C) EPLA, 2011

引用

页数：6

共 25 条

[1] Universal temperature scaling of flux line pinning in high-temperature superconducting thin films [J].