Internal friction study of high Tc BSCCO ceramic superconductor within the temperature range 88–623 K

Zeng, Wenfei; Zhang, J.X.; Lin, G.M.; Du, C.L.; Fung, P. C. W.; Siu, G. G.

doi:10.1016/0038-1098(89)90338-4

Cited by 13 publications

(2 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In more detail, the intensity of the peak was dependent upon the content of the extra oxygen, while the temperature at which it was recorded was frequency dependent. This is probably the reason why many other papers reported this peak, but at different temperatures, such as 373 K [50] or 300 K [51]. However, all of them associated this peak to the movement of additional oxygen in the ab plane of the crystal, as its activation energy (0.9 eV) was close to the diffusion energy of oxygen in the ab plane (0.93 eV), determined by tracer diffusion [30].…”

Section: Discussionmentioning

confidence: 89%

Electrical study of an unusual phase transformation in a Bi₂Sr₂Ca₂Cu₃O_10+xwhisker at room temperature

Truccato¹,

Cagliero²,

Agostino³

et al. 2006

Supercond. Sci. Technol.

View full text Add to dashboard Cite

We report the observation of a phase transformation which can occur in a microscopic double phase BSCCO whisker at room temperature. We performed electrical resistivity measurements by thermally cycling the whisker in the range 78-300 K in a helium atmosphere and observed a decrease of the Bi-2223 phase amount in favour of the Bi-2212 phase, accompanied by an increase in the T c of the Bi-2212 phase. A longer ageing of the whisker increased its resistance by about a factor of four at room temperature and caused a semiconducting behaviour at low temperature. We demonstrate that a simple electrical model can account for the experimental data and disentangle the contributions of the two phases.

show abstract

Section: Discussionmentioning

confidence: 89%

Electrical study of an unusual phase transformation in a Bi₂Sr₂Ca₂Cu₃O_10+xwhisker at room temperature

Truccato¹,

Cagliero²,

Agostino³

et al. 2006

Supercond. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…In BSCCO, several peaks of elastic energy loss (internal friction) were observed in different temperature ranges. Zeng et al [15] reported a thermally activated relaxation process at around 350 K, measured by using a torsion pendulum (with a frequency of 0.1-5.0 Hz) and attributed it to the ordering of crystal composition. Jiaju et al [16] measured internal friction by using the free decay of a resonant bar (in the kilohertz frequency range) and observed a thermally activated relaxation peak near 170 K and suggest that the relaxation process causing the peak is electronic relaxation.…”

Section: Resultsmentioning

confidence: 99%

Interstitial oxygen mobility in superconducting samples of Bi₂Sr₂CaCu₂O_8+y

Gimenez

Grandini

Santos

2006

Supercond. Sci. Technol.

View full text Add to dashboard Cite

Since high-temperature superconductors were discovered, several studies have been made on their physical properties, attempting to associate them to the origin of superconductivity. Obviously, the oxygen atoms interstitially dissolved in the matrix have an important role in superconductivity, since they move easily in the lattice. In addition, they contribute to hole creation in the CuO 2 planes. Anelastic spectroscopy (internal friction) measurements are sensitive tools for the study of defects in solids, in particular for oxygen mobility. In this paper, Bi 2 Sr 2 CaCu 2 O 8+y samples with several different amounts of interstitial oxygen were analysed by means of anelastic spectroscopy measurements. The measurements were performed by using a torsion pendulum operating at a frequency of about 40 Hz. Complex relaxation structures were observed and attributed to the shift of the oxygen interstitial atoms in BiO chains.

show abstract

Phase-transition toughening of high-T c superconducting ceramics

Siu

Zeng

1993

JOURNAL OF MATERIAL SCIENCE

View full text Add to dashboard Cite

Internal friction study of high Tc BSCCO ceramic superconductor within the temperature range 88–623 K

Cited by 13 publications

References 3 publications

Electrical study of an unusual phase transformation in a Bi₂Sr₂Ca₂Cu₃O_10+xwhisker at room temperature

Electrical study of an unusual phase transformation in a Bi₂Sr₂Ca₂Cu₃O_10+xwhisker at room temperature

Interstitial oxygen mobility in superconducting samples of Bi₂Sr₂CaCu₂O_8+y

Phase-transition toughening of high-T c superconducting ceramics

Contact Info

Product

Resources

About

Internal friction study of high Tc BSCCO ceramic superconductor within the temperature range 88–623 K

Cited by 13 publications

References 3 publications

Electrical study of an unusual phase transformation in a Bi2Sr2Ca2Cu3O10+xwhisker at room temperature

Electrical study of an unusual phase transformation in a Bi2Sr2Ca2Cu3O10+xwhisker at room temperature

Interstitial oxygen mobility in superconducting samples of Bi2Sr2CaCu2O8+y

Phase-transition toughening of high-T c superconducting ceramics

Contact Info

Product

Resources

About

Electrical study of an unusual phase transformation in a Bi₂Sr₂Ca₂Cu₃O_10+xwhisker at room temperature

Electrical study of an unusual phase transformation in a Bi₂Sr₂Ca₂Cu₃O_10+xwhisker at room temperature

Interstitial oxygen mobility in superconducting samples of Bi₂Sr₂CaCu₂O_8+y