Reduction of the zero-phonon Fe57 Mössbauer fraction just above Tc in the (Bi,Pb)2Sr2Ca2Cu3O10 superconductor
Th. Sinnemann, R. Job, M. Rosenberg
DOI 10.1103/PhysRevB.45.4941 · Physical Review B
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Abstract
A decrease of the zero-phonon fraction of the Fe57 Mössbauer absorption was observed in the temperature range 93–120 K in an Fe-doped (Bi,Pb)2Sr2Ca2Cu3O10-type high-temperature superconductor indicating an anomalous behavior of the lattice vibrations. The isomer shift changes slightly in the same temperature range. The absence of a Goldanskii-Karyagin effect shows that the Fe mean-square displacement is isotropic. Between 150 and 550 K, the temperature dependence of the zero-phonon fraction follows a Debye model with a Mössbauer Debye temperature of 350 ±20 K.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi1.84Pb0.34Sr2.03Ca1.9(Cu0.97Fe0.03)3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 95.5 | Pressure not reported | unknown |
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