A1 Refereed original research article in a scientific journal
Influence of BaZrO3 dopant concentration on properties of YBa2Cu3O6+x films in magnetic fields up to 30 T
Authors: Huhtinen H, Irjala M, Paturi P, Shakhov MA, Laiho R
Publisher: AMER INST PHYSICS
Publication year: 2010
Journal: Journal of Applied Physics
Journal name in source: JOURNAL OF APPLIED PHYSICS
Journal acronym: J APPL PHYS
Article number: 053906
Number in series: 5
Volume: 107
Issue: 5
Number of pages: 6
ISSN: 0021-8979
DOI: https://doi.org/10.1063/1.3329539
Abstract
The effect of BaZrO3 (BZO) dopant concentration on superconducting properties in YBa2Cu3O6+x thin films is investigated in a wide magnetic field range up to 30 T. Based on the magnetization and resistivity measurements, the optimal BZO concentration for flux pinning is found to be 4% up to 20 T and increasing up to around 8% in higher fields. This result is qualitatively explained by a model where more BZO is needed in order to organize optimal columnar defect structure at high fields because the amount of single BZO particles acting as isotropic point pinning centers is increased, especially in high BZO concentrations. This means that for applications of thin film or coated conductor structures carried out at high magnetic fields, even higher dopant concentration than used in a low-field range should be produced in order to attain the optimal flux pinning conditions. (C) 2010 American Institute of Physics. [doi:10.1063/1.3329539]
The effect of BaZrO3 (BZO) dopant concentration on superconducting properties in YBa2Cu3O6+x thin films is investigated in a wide magnetic field range up to 30 T. Based on the magnetization and resistivity measurements, the optimal BZO concentration for flux pinning is found to be 4% up to 20 T and increasing up to around 8% in higher fields. This result is qualitatively explained by a model where more BZO is needed in order to organize optimal columnar defect structure at high fields because the amount of single BZO particles acting as isotropic point pinning centers is increased, especially in high BZO concentrations. This means that for applications of thin film or coated conductor structures carried out at high magnetic fields, even higher dopant concentration than used in a low-field range should be produced in order to attain the optimal flux pinning conditions. (C) 2010 American Institute of Physics. [doi:10.1063/1.3329539]
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