Plastic vortex-creep in YBa$_2$Cu$_3$O$_{7-x}$ crystals

Y. Abulafia; A. Shaulov; Y. Wolfus; R. Prozorov; L. Burlachkov; Y. Yeshurun; D. Majer E. Zeldov; H. Wühl; V. B. Geshkenbein; V. M. Vinokur

doi:10.1103/PhysRevLett.77.1596

paper

Plastic vortex-creep in YBa $_{2}$ Cu $_{3}$ O $_{7 - x}$ crystals

arXiv:supr-con/9606003 · doi:10.1103/PhysRevLett.77.1596

Abstract

Local magnetic relaxation measurements in YBa $_{2}$ Cu $_{3}$ O $_{7 - x}$ crystals show evidence for plastic vortex-creep associated with the motion of dislocations in the vortex lattice. This creep mechanism governs the vortex dynamics in a wide range of temperatures and fields below the melting line and above the field corresponding to the peak in the ''fishtail'' magnetization. In this range the activation energy $U_{pl}$ , which decreases with field, drops below the elastic (collective) creep activation energy, $U_{e l}$ , which increases with field. A crossover in flux dynamics from elastic to plastic creep is shown to be the origin of the fishtail in YBa $_{2}$ Cu $_{3}$ O $_{7 - x}$ .

10 pages, RevTeX type, 4 PS figures

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Plastic vortex-creep in YBa2​Cu3​O7−x​ crystals

Abstract

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Cited by in corpus (63)

Plastic vortex-creep in YBa $_{2}$ Cu $_{3}$ O $_{7 - x}$ crystals