High-Temperature Superconductors and Related Compounds Studied by Mössbauer Spectroscopy
57Fe, 119Sn, and 151Eu Mössbauer spectroscopy was used to study the chemical structure, phonon mode changes, and low-temperature phase transformation around the Tc as well as suppression of superconductivity in high-temperature superconductors and related compounds. Anomalous temperature-dependent c...
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| Format: | Article |
| Language: | English |
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Wiley
1993-01-01
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| Series: | Active and Passive Electronic Components |
| Online Access: | http://dx.doi.org/10.1155/1993/92078 |
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| author | E. Kuzmann Z. Homonnay S. Nagy M. Gál A. Vértes |
| author_facet | E. Kuzmann Z. Homonnay S. Nagy M. Gál A. Vértes |
| author_sort | E. Kuzmann |
| collection | DOAJ |
| description | 57Fe, 119Sn, and 151Eu Mössbauer spectroscopy was used to study the chemical structure, phonon mode
changes, and low-temperature phase transformation around the Tc as well as suppression of superconductivity
in high-temperature superconductors and related compounds. Anomalous temperature-dependent
changes in the total 57Fe spectral area fraction and in the Mössbauer line shift were simultaneously
found around the Tc in a EuBa2(Cu0.9957Fe0.01)3O7-d superconductor. These anomalous changes
were attributed to phonon softening and low-temperature phase transformation occurring around
the superconducting transition. Significant differences were observed between the 57Fe Mössbauer
spectra of superconducting EuBa2(Cu0.9957Fe0.01)3O7-d and the isostructural non-superconducting
PrBa2(Cu0.9957Fe0.01)3O7-d. The differences were interpreted in connection with the suppression of superconductivity
(by hole filling or hybridization of Pr, Cu and O states) in the Pr-containing compound.
The unusually high isomer shift value observed in the Pr-containing material can give evidence for the
charge transfer mechanism between the Cu(1) chains and the Cu(2) planes and for its role in the
suppression of superconductivity. |
| format | Article |
| id | doaj-art-88fb9139e5474266a2b5a6778e3ae2e4 |
| institution | Kabale University |
| issn | 0882-7516 1563-5031 |
| language | English |
| publishDate | 1993-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Active and Passive Electronic Components |
| spelling | doaj-art-88fb9139e5474266a2b5a6778e3ae2e42025-02-03T06:45:27ZengWileyActive and Passive Electronic Components0882-75161563-50311993-01-01153-421122410.1155/1993/92078High-Temperature Superconductors and Related Compounds Studied by Mössbauer SpectroscopyE. Kuzmann0Z. Homonnay1S. Nagy2M. Gál3A. Vértes4Department of Nuclear Chemistry, Eötvös Loránd University, Budapest, HungaryDepartment of Nuclear Chemistry, Eötvös Loránd University, Budapest, HungaryDepartment of Nuclear Chemistry, Eötvös Loránd University, Budapest, HungaryDepartment of General and Inorganic Chemistry, Eötvös Loránd University, Budapest, HungaryDepartment of Nuclear Chemistry, Eötvös Loránd University, Budapest, Hungary57Fe, 119Sn, and 151Eu Mössbauer spectroscopy was used to study the chemical structure, phonon mode changes, and low-temperature phase transformation around the Tc as well as suppression of superconductivity in high-temperature superconductors and related compounds. Anomalous temperature-dependent changes in the total 57Fe spectral area fraction and in the Mössbauer line shift were simultaneously found around the Tc in a EuBa2(Cu0.9957Fe0.01)3O7-d superconductor. These anomalous changes were attributed to phonon softening and low-temperature phase transformation occurring around the superconducting transition. Significant differences were observed between the 57Fe Mössbauer spectra of superconducting EuBa2(Cu0.9957Fe0.01)3O7-d and the isostructural non-superconducting PrBa2(Cu0.9957Fe0.01)3O7-d. The differences were interpreted in connection with the suppression of superconductivity (by hole filling or hybridization of Pr, Cu and O states) in the Pr-containing compound. The unusually high isomer shift value observed in the Pr-containing material can give evidence for the charge transfer mechanism between the Cu(1) chains and the Cu(2) planes and for its role in the suppression of superconductivity.http://dx.doi.org/10.1155/1993/92078 |
| spellingShingle | E. Kuzmann Z. Homonnay S. Nagy M. Gál A. Vértes High-Temperature Superconductors and Related Compounds Studied by Mössbauer Spectroscopy Active and Passive Electronic Components |
| title | High-Temperature Superconductors and Related Compounds Studied by
Mössbauer Spectroscopy |
| title_full | High-Temperature Superconductors and Related Compounds Studied by
Mössbauer Spectroscopy |
| title_fullStr | High-Temperature Superconductors and Related Compounds Studied by
Mössbauer Spectroscopy |
| title_full_unstemmed | High-Temperature Superconductors and Related Compounds Studied by
Mössbauer Spectroscopy |
| title_short | High-Temperature Superconductors and Related Compounds Studied by
Mössbauer Spectroscopy |
| title_sort | high temperature superconductors and related compounds studied by mossbauer spectroscopy |
| url | http://dx.doi.org/10.1155/1993/92078 |
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