Pinning Landscape Analysis in YBCO Films With Epitaxial and/or Non-Coherent BZO Nanoparticles

Author

Palau, A. ; Llordés, A. ; Gibert, M. ; Puig, T. ; Pomar, A. ; Obradors, X.

Author_Institution

Inst. de Ciincia de Mater. de Barcelona, CSIC, Barcelona, Spain

Volume

21

Issue

3

fYear

2011

fDate

6/1/2011 12:00:00 AM

Firstpage

3243

Lastpage

3246

Abstract

The effect of different kind of BaZrO₃ (BZO) nanoparticles on the pinning landscape of YBCO thin films have been investigated. We have correlated the microstrain of the YBCO nanocomposites with the presence of non-coherent and epitaxial BZO nanoparticles. Isotropic and anisotropic pinning contributions have been analyzed by means of angular transport critical current measurements. We show that very high enhancement of isotropic Jc is obtained due to the presence of non-coherent BZO nanoparticles, which can be correlated with an enhancement of the microstrain and a reduction of the anisotropy. Moreover, the contribution of epitaxial interfacial nanoparticles, which enhances the anisotropic Jc component along the c-axis have been also identified.

Keywords

barium compounds; critical current density (superconductivity); flux pinning; high-temperature superconductors; nanocomposites; nanoparticles; superconducting thin films; yttrium compounds; YBCO thin films; YBCO-BaZrO₃; angular transport critical current measurements; anisotropic pinning contributions; epitaxial interfacial nanoparticles; isotropic critical current density; microstrain; nanocomposites; noncoherent nanoparticles; pinning landscape analysis; Anisotropic magnetoresistance; Critical current density; Epitaxial growth; Magnetic anisotropy; Nanocomposites; Nanoparticles; Yttrium barium copper oxide; BZO nanoparticles; YBCO nanocomposites; critical current anisotropy; microstrain; vortex pinning;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2010.2092408

Filename

5672806