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- W2076304827 abstract "Dependence of the critical current on applied magnetic field ${j}_{c}({B}_{a})$ is investigated in ${mathrm{YBa}}_{2}{mathrm{Cu}}_{3}{mathrm{O}}_{6+x}$ (YBCO) films prepared by pulsed laser deposition from pure YBCO target and from those doped with 2.9 or $9.0phantom{rule{0.3em}{0ex}}mathrm{wt}.phantom{rule{0.2em}{0ex}}%$ ${mathrm{BaZrO}}_{3}$. All targets were sintered from nanophase powders made by a citrate-gel process. Transmission electron microscopy images show distributions of ${mathrm{BaZrO}}_{3}$ particles with typical diameters of $5--10phantom{rule{0.3em}{0ex}}mathrm{nm}$ in the doped films. In comparison with the pure YBCO film the value of ${j}_{c}(0)$ is slightly smaller in the film deposited from the target doped with $2.9phantom{rule{0.3em}{0ex}}mathrm{wt}.phantom{rule{0.2em}{0ex}}%$ ${mathrm{BaZrO}}_{3}$ and only half in case of $9.0phantom{rule{0.3em}{0ex}}mathrm{wt}.phantom{rule{0.2em}{0ex}}%$ doping. Two interesting phenomena in the behavior of ${j}_{c}({B}_{a})$ are observed for the doped films. First, the low-field plateau of ${j}_{c}$ is significantly lengthened and second, in fields above the accommodation field ${B}^{*}$ marking the end of this plateau the rate of decrease of ${j}_{c}$ is strongly reduced. These results are well fitted with a critical state model of superconductors taking into account the self field effects at low applied magnetic fields." @default.
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- W2076304827 date "2006-06-23" @default.
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- W2076304827 title "Magnetic field dependence of the critical current and the flux pinning mechanism in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mi>YBa</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Cu</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mrow><mml:mn>6</mml:mn><mml:mo>+</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>films doped with<mml:math xmlns:mml=http://www.w3.org/…" @default.
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- W2076304827 doi "https://doi.org/10.1103/physrevb.73.224522" @default.
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