Abstract
We report the observation at different currents of voltage-angle characteristics (VAC) of flux creep in YBaCuO single crystals with unidirectional twins in the presence of the magnetic fieldH=1.5 T applied ina−b plane and directed in a small angle range near twin planes (TP). From the simple phenomenological analysis of the VAC measured at fixed temperature nearT c we derive the activation energy of flux creep, the critical angle θ*, the transport critical current angle dependencej c (ϕ) and also the value of critical current anisotropy for H‖TP and HτTP.
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