## Abstract

The resistivity, {rho}, of sintered pellets of a few high-temperature superconductors was measured at very close intervals in the temperature range T{sub co} to T{sub co}+30K, where T{sub co} is the temperature at which the resistivity drops to zero. T{sub m} is the temperature at which d{rho}/dT shows a peak. A plot of the logarithm of the excess electrical conductivity ({sigma}(T) -{sigma}(T{sub m})), vs logarithm of T-T{sub co} is seen to be linear in every case from T{sub co} to a temperature T{sup *} < T{sub m}. The average slope of the plots has a value of 1.26 {+-} 0.07. This value is close to the exponent to be expected from the similarity of the model Hamiltonian of a granular superconductor to the model Hamiltonian describing a three dimensional XY ferromagnet. (author). 20 refs, 4 figs, 2 tabs.

## Citation Formats

Srinivasan, R.
Excess conductivity in the para-coherence region in high temperature superconductors.
IAEA: N. p.,
1993.
Web.

Srinivasan, R.
Excess conductivity in the para-coherence region in high temperature superconductors.
IAEA.

Srinivasan, R.
1993.
"Excess conductivity in the para-coherence region in high temperature superconductors."
IAEA.

@misc{etde_100423,

title = {Excess conductivity in the para-coherence region in high temperature superconductors}

author = {Srinivasan, R}

abstractNote = {The resistivity, {rho}, of sintered pellets of a few high-temperature superconductors was measured at very close intervals in the temperature range T{sub co} to T{sub co}+30K, where T{sub co} is the temperature at which the resistivity drops to zero. T{sub m} is the temperature at which d{rho}/dT shows a peak. A plot of the logarithm of the excess electrical conductivity ({sigma}(T) -{sigma}(T{sub m})), vs logarithm of T-T{sub co} is seen to be linear in every case from T{sub co} to a temperature T{sup *} < T{sub m}. The average slope of the plots has a value of 1.26 {+-} 0.07. This value is close to the exponent to be expected from the similarity of the model Hamiltonian of a granular superconductor to the model Hamiltonian describing a three dimensional XY ferromagnet. (author). 20 refs, 4 figs, 2 tabs.}

place = {IAEA}

year = {1993}

month = {Dec}

}

title = {Excess conductivity in the para-coherence region in high temperature superconductors}

author = {Srinivasan, R}

abstractNote = {The resistivity, {rho}, of sintered pellets of a few high-temperature superconductors was measured at very close intervals in the temperature range T{sub co} to T{sub co}+30K, where T{sub co} is the temperature at which the resistivity drops to zero. T{sub m} is the temperature at which d{rho}/dT shows a peak. A plot of the logarithm of the excess electrical conductivity ({sigma}(T) -{sigma}(T{sub m})), vs logarithm of T-T{sub co} is seen to be linear in every case from T{sub co} to a temperature T{sup *} < T{sub m}. The average slope of the plots has a value of 1.26 {+-} 0.07. This value is close to the exponent to be expected from the similarity of the model Hamiltonian of a granular superconductor to the model Hamiltonian describing a three dimensional XY ferromagnet. (author). 20 refs, 4 figs, 2 tabs.}

place = {IAEA}

year = {1993}

month = {Dec}

}