Low-temperature vortex state of the high-Tc superconductor Bi2Sr2Ca2Cu3O10 in high magnetic fields

Qiang Li; H. J. Wiesmann; M. Suenaga; L. Motowidlo; P. Haldar

doi:10.1103/PhysRevB.51.701

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Low-temperature vortex state of the high-Tc superconductor Bi2Sr2Ca2Cu3O10 in high magnetic fields

Qiang Li, H. J. Wiesmann, M. Suenaga, L. Motowidlo, P. Haldar

DOI 10.1103/PhysRevB.51.701 · Physical Review B

T1

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Abstract

We report detailed measurements of current-voltage characteristics for a Bi2Sr2Ca2Cu3O10/Ag tape immersed in liquid neon (27 K) and in liquid oxygen (54–90 K) as a function of applied magnetic field up to 17 T. It is found that the electric-field-versus-current-density (E-J) curves can be well described by the relation E/J∼exp[-(J0/J)μ], where J0 is a constant. The exponent μ at elevated temperature (T≥54 K) is less than 0.9, and is inconsistent with the vortex-glass description, which predicts μ<1. At low-temperature (T=27 K), a plateau in the value of μ(≊1.45) is found for 2≤H≤8 T, which may be described by the collective creep theory at this temperature and field range.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2Ca2Cu3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	106.5	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown