A1 Refereed original research article in a scientific journal
Hall effect and pinning regimes in YBa2Cu3O6+x thin films doped with BaZrO3 nanoparticles
Authors: Safonchik M, Traito K, Tuominen S, Paturi P, Huhtinen H, Laiho R
Publisher: ELSEVIER SCIENCE BV
Publication year: 2009
Journal:: Physica C: Superconductivity and its Applications
Journal name in source: PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
Journal acronym: PHYSICA C
Volume: 469
Issue: 22
First page : 1983
Last page: 1986
Number of pages: 4
ISSN: 0921-4534
DOI: https://doi.org/10.1016/j.physc.2009.08.001
Abstract
Hall effect and flux pinning in YBa2Cu3O6+x (YBCO) thin films doped with BaZrO3 (BZO) nanoparticles is investigated. The results show that sign reversal of the Hall coefficient from positive hole-like to negative electron-like occurs in vortex-liquid regime of undoped and BZO-doped YBCO films. With increasing BZO concentration the amplitude of the negative Hall effect is suppressed while the temperature position of the anomalous Hall effect does not depend significantly on doping level. In addition, it is shown that Hall conductivity increases non-monotonically with increasing BZO doping. These results support a model where BZO at low doping concentration induces point pinning centres turning to strong columnar pinning defects in films doped with 4% BZO. (c) 2009 Elsevier B.V. All rights reserved.
Hall effect and flux pinning in YBa2Cu3O6+x (YBCO) thin films doped with BaZrO3 (BZO) nanoparticles is investigated. The results show that sign reversal of the Hall coefficient from positive hole-like to negative electron-like occurs in vortex-liquid regime of undoped and BZO-doped YBCO films. With increasing BZO concentration the amplitude of the negative Hall effect is suppressed while the temperature position of the anomalous Hall effect does not depend significantly on doping level. In addition, it is shown that Hall conductivity increases non-monotonically with increasing BZO doping. These results support a model where BZO at low doping concentration induces point pinning centres turning to strong columnar pinning defects in films doped with 4% BZO. (c) 2009 Elsevier B.V. All rights reserved.
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