Mössbauer study of the lattice dynamics in doped119 superconducting and nonsuperconducting YBa2Cu3O7−δ

Tan Yuen; C. L. Lin; J. E. Crow; G. N. Myer; R. E. Salomon; P. Schlottmann; N. Bykovetz; Warren N. Herman

doi:10.1103/PhysRevB.37.3770

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Mössbauer study of the lattice dynamics in doped119 superconducting and nonsuperconducting YBa2Cu3O7−δ

Tan Yuen, C. L. Lin, J. E. Crow, G. N. Myer, R. E. Salomon, P. Schlottmann, N. Bykovetz, Warren N. Herman

DOI 10.1103/PhysRevB.37.3770 · Physical Review B

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Abstract

The temperature dependence of the relative recoil-free fraction of the Sn119 Mössbauer absorption has been measured in the orthorhombic superconducting and in the tetragonal nonsuperconducting phase of Sn119 doped YBa2Cu3O7−δ. For the superconducting YBa2Cu3O7−δ phase, the recoil-free fraction shows softening which appears for T<150 K, whereas for the nonsuperconducting YBa2Cu3O7−δ phase, it agrees with that obtained using the measured phonon spectrum without any evidence of softening.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	95	Pressure not reported	unknown
YBa2(Cu0.96Sn0.04)3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	93	Pressure not reported	unknown
(La,Ba)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown