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Moessbauer study of the lattice dynamics in /sup 119/Sn-doped superconducting and nonsuperconducting YBa/sub 2/Cu/sub 3/O/sub 7/. sqrt. /sub delta/

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)
The temperature dependence of the relative recoil-free fraction of the /sup 119/Sn Moessbauer absorption has been measured in the orthorhombic superconducting and in the tetragonal nonsuperconducting phase of /sup 119/Sn doped YBa/sub 2/Cu/sub 3/O/sub 7/..sqrt../sub delta/. For the superconducting YBa/sub 2/Cu/sub 3/O/sub 7/..sqrt../sub delta/ phase, the recoil-free fraction shows softening which appears for T<150 K, whereas for the nonsuperconducting YBa/sub 2/Cu/sub 3/O/sub 7/..sqrt../sub delta/ phase, it agrees with that obtained using the measured phonon spectrum without any evidence of softening
Research Organization:
Center for Materials Research, Temple University, Philadelphia, Pennsylvania 19122
OSTI ID:
5288529
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 37:7; ISSN PRBMD
Country of Publication:
United States
Language:
English

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