Nernst effect by laser-pulse heating in Tl-Ba-Ca-Cu-O superconducting thin films

H. Lengfellner; A. Schnellbögl; J. Betz; W. Prettl; K. F. Renk

doi:10.1103/PhysRevB.42.6264

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Nernst effect by laser-pulse heating in Tl-Ba-Ca-Cu-O superconducting thin films

H. Lengfellner, A. Schnellbögl, J. Betz, W. Prettl, K. F. Renk

DOI 10.1103/PhysRevB.42.6264 · Physical Review B

T1

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Abstract

The Nernst effect has been observed in a high-temperature superconductor with a laser-pulse-heating method. Irradiating a Tl-Ba-Ca-Cu-O film by a short laser pulse, a voltage signal transverse to an external, surface-parallel magnetic field has been observed. This signal is attributed to vortex depinning and vortex transport driven by the laser-induced temperature gradient. We describe our results by thermal flux tube activation and find a distribution of pinning energies from about 100 to 4000 K.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Tl2Ba2CaCu2Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	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
Bi2.2Sr2Ca0.8Cu2O8+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown