Thermal fluctuations near a phase transition probed through the electrical resistivity of high-temperature superconductors

2010 ◽  
Vol 78 (3) ◽  
pp. 310-316
Author(s):  
Noelia Cotón ◽  
Francisco J. Guzmán ◽  
Manuel V. Ramallo ◽  
Alexandre Ríos ◽  
Carolina Torrón ◽  
...  
Keyword(s):  
Phase Transition ◽  
Electrical Resistivity ◽  
High Temperature ◽  
High Temperature Superconductors ◽  
Thermal Fluctuations

scholarly journals Cooper Pair-Like Systems at High Temperature and their Role on Fluctuations Near the Critical Temperature

1998 ◽  
Vol 12 (29n31) ◽  
pp. 3216-3219 ◽  
Author(s):  
M. Ausloos ◽  
S. Dorbolo
Keyword(s):  
Phase Transition ◽  
Electrical Resistivity ◽  
High Temperature ◽  
Critical Temperature ◽  
Oxygen Diffusion ◽  
Cooper Pair ◽  
Anomalous Behavior ◽  
Anomalous Effect ◽  
Linear Temperature ◽  
Ybco Sample

A logarithmic behavior is hidden in the linear temperature regime of the electrical resistivity R(T) of some YBCO sample below 2T c where "pairs" break apart, fluctuations occur and "a gap is opening". An anomalous effect also occurs near 200 K in the normal state Hall coefficient. In a simulation of oxygen diffusion in planar 123 YBCO, an anomalous behavior is found in the oxygen-vacancy motion near such a temperature. We claim that the behavior of the specific heat above and near the critical temperature should be reexamined in order to show the influence and implications of fluctuations and dimensionality on the nature of the phase transition and on the true onset temperature.

Phase transition regulation and piezoelectric performance optimization of fresnoite crystal for high temperature acceleration sensing

2021 ◽  
Author(s):  
Chao Jiang ◽  
Caizi Zhang ◽  
Fangfei Li ◽  
Li Sun ◽  
Yanlu Li ◽  
...  
Keyword(s):  
Phase Transition ◽  
Electrical Resistivity ◽  
High Temperature ◽  
Performance Optimization ◽  
Elevated Temperatures ◽  
Piezoelectric Response ◽  
Potential Candidate ◽  
High Electrical Resistivity ◽  
Sensing Applications ◽  
Piezoelectric Performance

Fresnoite crystal, Ba2TiSi2O8 (BTS), is a potential candidate for high temperature piezoelectric sensing applications, due to high electrical resistivity and strong piezoelectric response at elevated temperatures. However, anomalies of electro-elastic...

HETEROSTRUCTURAL FLUCTUATIONS IN SUPERCONDUCTORS

1992 ◽  
Vol 06 (01) ◽  
pp. 91-107 ◽  
Author(s):  
V. I. YUKALOV
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
High Temperature Superconductors ◽  
Crystallographic Structure ◽  
Superconducting Properties

Superconductors are considered in which there occur fluctuations of one crystallographic structure inside another. The role of these heterostructural fluctuations on superconducting properties are analysed. The occurrence of these fluctuations explains anomalous saggings of Mössbauer factor at phase transition in high-temperature superconductors.

Decomposition of High Temperature Superconductors in Water

1993 ◽  
Vol 58 (7) ◽  
pp. 1548-1554 ◽  
Author(s):  
Olga Smrčková ◽  
Dagmar Sýkorová ◽  
Pavel Svoboda ◽  
Petr Vašek
Keyword(s):  
Electrical Resistivity ◽  
Magnetic Susceptibility ◽  
High Temperature ◽  
High Temperature Superconductors ◽  
Relative Volume ◽  
Boiling Water ◽  
Nominal Composition ◽  
Superconducting Phases ◽  
Ceramic Superconductors ◽  
Superconductive Phase

Changes of magnetic susceptibility and electrical resistivity of ceramic superconductors of nominal composition YBa2Cu3O7-y and Bi1.4Pb0.6Sr2Ca2Cu3.6Ox observed during their soaking in water are reported. It was found that the YBa2Cu3O7-y superconductor is destroyed in few minutes by boiling water. At lower temperatures the hydrolysis reduces the volume of the superconductive phase, as seen from the susceptibility measurements. Reaction of Bi1.4Pb0.6Sr2Ca2Cu3.6Ox with water causes a decrease of the relative volume of both superconducting phases at a rate substantially higher for the high temperature one (Tc = 110 K).

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