TY - JOUR
T1 - Plastic vortex creep in YBa2Cu3O7-x crystals
AU - Abulafia, Y.
AU - Shaulov, A.
AU - Wolfus, Y.
AU - Prozorov, R.
AU - Burlachkov, L.
AU - Yeshurun, Y.
AU - Majer, D.
AU - Zeldov, E.
AU - Wühl, H.
AU - Geshkenbein, V. B.
AU - Vinokur, V. M.
PY - 1996
Y1 - 1996
N2 - Local magnetic relaxation measurements in YBa2 Cu3O7-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 Upl, which decreases with field, drops below the elastic (collective) creep activation energy, Uel, which increases with field. A crossover in flux dynamics from elastic to plastic creep is shown to be the origin of the fishtail in YBa2Cu3O7-x .
AB - Local magnetic relaxation measurements in YBa2 Cu3O7-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 Upl, which decreases with field, drops below the elastic (collective) creep activation energy, Uel, which increases with field. A crossover in flux dynamics from elastic to plastic creep is shown to be the origin of the fishtail in YBa2Cu3O7-x .
UR - http://www.scopus.com/inward/record.url?scp=0000802635&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.77.1596
DO - 10.1103/PhysRevLett.77.1596
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SN - 0031-9007
VL - 77
SP - 1596
EP - 1599
JO - Physical Review Letters
JF - Physical Review Letters
IS - 8
ER -