Measurement of laser-induced voltages of superconducting Bi-Sr-Ca-Cu-O

Wang Lanping; Lin Jinlong; Feng Qingrong; Wang Guowen; Cai Jiye; Tang Yonggui

doi:10.1103/PhysRevB.46.5773

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Measurement of laser-induced voltages of superconducting Bi-Sr-Ca-Cu-O

Wang Lanping, Lin Jinlong, Feng Qingrong, Wang Guowen, Cai Jiye, Tang Yonggui

DOI 10.1103/PhysRevB.46.5773 · Physical Review B

T1

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Abstract

We report an experimental investigation of laser-induced voltages across point-contact junctions of Pt tips and superconducting Bi compounds. It has been observed that the laser-induced voltages of all 2:2:2:3 granular samples and 2:2:1:2 single-crystal samples are converted with increasing temperature from positive to negative sign, passing through a zero point. The signs for 2:2:1:2 granular samples and n-type Nd1.85Ce0.15CuO4+y sample are always positive. The temperature corresponding to the zero point is approximately the superconducting transition temperature (midpoint) of the measured sample.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2Ca2Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	108.4	Pressure not reported	midpoint
Bi2Sr2CaCu2Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	67	Pressure not reported	midpoint
Nd1.85Ce0.15CuO4+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	22	Pressure not reported	unknown