Anomalous behavior of the lattice vibration of Bi2Sr2Ca1Cu1.96Fe0.04Oyand its possible correlation with Tc
- 2 December 1991
- journal article
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 3 (48) , 9713-9721
- https://doi.org/10.1088/0953-8984/3/48/013
Abstract
The vibrational motion of Fe atoms in Bi2Sr2Ca1Cu1.96Fe0.04Oy studied by means of Mossbauer spectroscopy was found to be very anharmonic. This anharmonic behaviour can be explained by local structural excitations between two or more states supposedly existing in the material rather than by the usual phonon-phonon interactions. The increase in Tc for the annealed Bi2Sr2Ca1Cu1.96Fe0.04Oy is attributed to the increase in local structural instabilities which enhances the effective electron-electron pairing.Keywords
This publication has 29 references indexed in Scilit:
- Variation in Tcfor Bi2Ca1Sr2Cu2Oydoped with Fe and subjected to vacuum annealingJournal of Physics: Condensed Matter, 1990
- Iron doping and Mössbauer spectroscopy in Bi-Sr-Ca-Cu ceramic superconductorsPhysica C: Superconductivity and its Applications, 1990
- Enhancement of Tc and reversible effects by annealing undoped and lead-doped Bi-Sr-Ca-Cu oxidesSolid State Communications, 1990
- Interrelationship between the transition temperatures of the (2223) and (2212) phases of Bi-based superconductorsPhysica C: Superconductivity and its Applications, 1990
- Anomalous behaviour of the chemical potential in superconductors with a low density of charge carriersPhysica C: Superconductivity and its Applications, 1990
- Origin of the incommensurate modulation of the 80-K superconductor derived from isostructural commensuratePhysical Review B, 1989
- Structure of the Fe-doped high-temperature superconductors Y1Ba2Cu3Oy and Bi2Sr2Ca1Cu2OyJournal of Applied Physics, 1989
- Structure Analysis of High-Tc Superconductor Bi-Ca-Sr-Cu-O by Processing of High-Resolution Electron Microscope ImagesJapanese Journal of Applied Physics, 1988
- Assignment of the Powder X-Ray Diffraction Pattern of Superconductor Bi2(Sr, Ca)3-xCu2OyJapanese Journal of Applied Physics, 1988
- A New High-Temperature Superconductor: Bi 2 Sr 3-x Ca x Cu 2 O 8+yScience, 1988