dorsal/arxiv
View SchemaPlastic vortex-creep in YBa$_2$Cu$_3$O$_{7-x}$ crystals
| Authors | Y. Abulafia, A. Shaulov, Y. Wolfus, R. Prozorov, L. Burlachkov, Y. Yeshurun, D. Majer E. Zeldov, H. Wühl, V. B. Geshkenbein, V. M. Vinokur |
|---|---|
| Categories | |
| ArXiv ID | supr-con/9606003 |
| URL | https://arxiv.org/abs/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, $U_{el}$, 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$_{7-x}$.
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"abstract": "Local magnetic relaxation measurements in YBa$_2$Cu$_3$O$_{7-x}$ crystals\nshow evidence for plastic vortex-creep associated with the motion of\ndislocations in the vortex lattice. This creep mechanism governs the vortex\ndynamics in a wide range of temperatures and fields below the melting line and\nabove the field corresponding to the peak in the \u0027\u0027fishtail\u0027\u0027 magnetization. In\nthis range the activation energy $U_{pl}$, which decreases with field, drops\nbelow the elastic (collective) creep activation energy, $U_{el}$, which\nincreases with field. A crossover in flux dynamics from elastic to plastic\ncreep is shown to be the origin of the fishtail in YBa$_2$Cu$_3$O$_{7-x}$.",
"arxiv_id": "supr-con/9606003",
"authors": [
"Y. Abulafia",
"A. Shaulov",
"Y. Wolfus",
"R. Prozorov",
"L. Burlachkov",
"Y. Yeshurun",
"D. Majer E. Zeldov",
"H. W\u00fchl",
"V. B. Geshkenbein",
"V. M. Vinokur"
],
"categories": [
"supr-con",
"cond-mat.supr-con"
],
"doi": "10.1103/PhysRevLett.77.1596",
"title": "Plastic vortex-creep in YBa$_2$Cu$_3$O$_{7-x}$ crystals",
"url": "https://arxiv.org/abs/supr-con/9606003"
},
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