The temperature dependence of critical current in YBa2Cu3O7&lt;FONT FACE=Symbol&gt;-&lt;/FONT&gt;d thin films deposited on MgO by an eclipse PLD

Ohmukai, Masato; Fujita, Takatoshi; Ohno, Tomoko

doi:10.1590/s0103-97332001000300027

Braz. J. Phys.

2001

DOI: 10.1590/s0103-97332001000300027

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The temperature dependence of critical current in YBa2Cu3O7<FONT FACE=Symbol>-</FONT>d thin films deposited on MgO by an eclipse PLD

Masato Ohmukai

Takatoshi Fujita

Tomoko Ohno

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Cited by 2 publications

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“…The solid line in the figure is a fit of the experimental J c (T ) to a power law: J c ∼ (1-T /T c ) n with exponent n ≈ 2.2. Similar results for the temperature dependence of J c in thin YBCO films were reported in, e.g., Refs [40,41]…”

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Dendritic flux instabilities inYBa2Cu3O7−xfilms: Effects of temperature and magnetic

et al. 2016

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Our recent success in triggering dendritic flux instabilities in YBa 2 Cu 3 O 7−δ (YBCO) films by applying magnetic fields at ultrahigh rates is followed here by a detailed study of the effect as a function of the field ramp rate,Ḃ a , and temperature, T. We trace the borderline in theḂ aT plane separating regions of smooth, gradual flux penetration and dendritic flux avalanches. In addition, we describe the changes in the dendritic morphology in the instability region as a result of changes in eitherḂ a or T. Our experimental results, showing a monotonic increase of the avalanche threshold field ramp rate with temperature, are discussed in the framework of existing theories. On the basis of these theories we also explain the high stability of YBCO to dendritic avalanches as compared to, e.g., MgB 2 , identifying the flux flow resistivity, rather than any of the thermal parameters, as the main parameter governing the film stability.

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Dendritic flux instabilities inYBa2Cu3O7−xfilms: Effects of temperature and magnetic

et al. 2016

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Experimental research on residual carbon of Y211 inclusions in a melt-textured Y123/Y211 composite

Zhang

Yuan

et al. 2016

Materials and Manufacturing Processes

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The temperature dependence of critical current in YBa2Cu3O7<FONT FACE=Symbol>-</FONT>d thin films deposited on MgO by an eclipse PLD

Cited by 2 publications

References 8 publications

Dendritic flux instabilities inYBa2Cu3O7−xfilms: Effects of temperature and magnetic

Dendritic flux instabilities inYBa2Cu3O7−xfilms: Effects of temperature and magnetic

Experimental research on residual carbon of Y211 inclusions in a melt-textured Y123/Y211 composite

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