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- W2753208518 abstract "Abstract The superconducting properties of BaPb 0.77 Bi 0.23 O 3 − δ compound were tested by transport and magnetization measurements from 2 to 14 K. The R–T curve at various magnetic fields is similar to that for MgB 2 superconductors. The temperature dependence of resistance below 10% of normal state resistance follows Arrhenius law and the field dependence of effective flux pinning energy shows an exponential behavior, U e f f = U ( 0 ) exp ( − 0.48 H ) . The H c –T line down to 2 K displays a power law, H c ( T ) ∝ ( 1 − T / T c ) n . The field dependence of flux pinning force displays two peaks originated from the intragrains and intergrains, respectively. The scaling result of Dew–Hughes model, F p = A h p ( 1 − h ) q , suggests that the flux pinning in the sample is the collective pinning of normal surface and point centers. The field dependence of critical current density shows a power law in the low magnetic field region and an exponential behavior, J c = J c 0 exp ( − β H ) , in high magnetic field region." @default.
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- W2753208518 date "2017-11-01" @default.
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- W2753208518 title "Flux pinning properties in BaPb 0.77 Bi 0.23 O<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML altimg=si7.gif overflow=scroll><mml:msub><mml:mrow /><mml:mrow><mml:mn>3</mml:mn><mml:mo>−</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:math>compound" @default.
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- W2753208518 doi "https://doi.org/10.1016/j.physc.2017.09.001" @default.
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