TY - JOUR
T1 - Nonequilibrium order-disorder vortex transitions in Bi2Sr2CaCu2O8+δ
AU - Kalisky, B.
AU - Giller, D.
AU - Shaulov, A.
AU - Yeshurun, Y.
N1 - Also in: Virtual Journal of Applications of Superconductivity, May 2003
PY - 2003/4
Y1 - 2003/4
N2 - Magneto-optical snapshots of the induction distribution across a Bi2Sr2CaCu2O8+δ crystal subjected to ramped magnetic fields reveal strong effects of transient disordered vortex states near the disorder-driven vortex phase transition. These transient states, predominantly generated by edge contamination during field ascending and by supercooling of the disordered vortex lattice during field descending, cause smearing of the transition and shift of its onset towards lower inductions. With decreasing temperature, these effects are more. pronounced as the lifetime of the transient vortex states increases. Similar effects are observed with increasing field sweep rates, as transient states with shorter lifetime play a role. These observations clarify previously reported puzzles, e.g., the absence of the second magnetization peak at low temperatures, its appearance at longer times, and the shift of its onset to lower inductions for higher field sweeping rates.
AB - Magneto-optical snapshots of the induction distribution across a Bi2Sr2CaCu2O8+δ crystal subjected to ramped magnetic fields reveal strong effects of transient disordered vortex states near the disorder-driven vortex phase transition. These transient states, predominantly generated by edge contamination during field ascending and by supercooling of the disordered vortex lattice during field descending, cause smearing of the transition and shift of its onset towards lower inductions. With decreasing temperature, these effects are more. pronounced as the lifetime of the transient vortex states increases. Similar effects are observed with increasing field sweep rates, as transient states with shorter lifetime play a role. These observations clarify previously reported puzzles, e.g., the absence of the second magnetization peak at low temperatures, its appearance at longer times, and the shift of its onset to lower inductions for higher field sweeping rates.
UR - http://www.scopus.com/inward/record.url?scp=0038778665&partnerID=8YFLogxK
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AN - SCOPUS:0038778665
SN - 0163-1829
VL - 67
SP - 1405081
EP - 1405084
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 14
M1 - 140508
ER -