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- W1970044810 abstract "The critical current density of an aligned Ag doped Bi2Sr2Ca2Cu3Ox tape has been measured from 10 K up to Tc (105 K) in magnetic fields up to 15 T. Measurements of the critical current density (Jc,(B, T)) have been completed for three different configurations of magnetic field, transport current, and superconducting tape: (i) J perpendicular to c axis, J perpendicular to B, and B perpendicular to c axis; (ii) J perpendicular to c axis, J perpendicular to B, and B//c axis; (iii) J perpendicular to c axis, J//B, and B perpendicular to c axis. In all three configurations at high magnetic fields up to 15 T, we find the critical current density can be described by Jc(B, T)= alpha ( phi , T) exp(- mu 0H/ beta ( phi , T)) where ( beta phi , T) is of a separable variable form beta ( phi , T)= beta /sup /(T)/f( phi ) where beta /sup /(T) is a function of temperature alone and f( phi ) is a constant dependent only on the orientation of B, J, and the c axis. A similar but not identical exponential magnetic field dependence has been found in Bi2Sr2Ca2Cu3Ox, Bi2Sr2CaCu2Ox and YBa2Cu3Ox, thin films. We discuss the evidence that the exponential magnetic field dependence suggests that a pair breaking mechanism operates at barriers in these materials. We conclude that the grain boundaries determine Jc(B, T) in the Bi2Sr2Ca2Cu3Ox textured tape." @default.
- W1970044810 created "2016-06-24" @default.
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- W1970044810 date "1994-11-14" @default.
- W1970044810 modified "2023-09-24" @default.
- W1970044810 title "Evidence that pair breaking at the grain boundaries of Bi2Sr2Ca2Cu3Oxtapes determines the critical current density above 10 K in high magnetic fields" @default.
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- W1970044810 doi "https://doi.org/10.1088/0953-8984/6/46/022" @default.
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