119Sn and151Eu Mössbauer study of EuBa2(Cu1-xSnx)3O7-y perovskites

E. Kuzmann, Z. Homonnay, A. Vértes, I. Kirschner, M. Gál, K. Torkos, B. Csákvári, K. Solymos, G. Horváth, J. Bánkuti, L. Korecz

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Abstract

Eu and Sn Mössbauer spectroscopy was used to study EuBa2(Cu1-xSnx)3O7-y metallic oxides. The spectra are characteristic for EuIII and SnIV states in all cases. The existence of at least two different Sn states was determined by decomposition of the Sn Mössbauer spectra. These Sn sites can be associated with nonequivalent Cu sites replaced by Sn atoms in the perovskite type lattice. Anomalous changes were observed in the isomer shifts and area fractions in the spectra measured at room temperature and at 77 K. It can be interpreted assuming low temperature phase transformation and phonon softening. Time dependent changes were found in the Sn spectra recorded at 77 K in the case of highest Sn concentration. The observed changes are consistent with a transitional stage of the low temperature phase transformation.

Original languageEnglish
Pages (from-to)747-752
Number of pages6
JournalHyperfine Interactions
Volume46
Issue number1-4
DOIs
Publication statusPublished - Mar 1989

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perovskites
Phase transitions
phase transformations
Isomers
Perovskite
Temperature
Oxides
Spectroscopy
softening
Decomposition
Atoms
isomers
decomposition
oxides
shift
room temperature
spectroscopy
atoms

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Electronic, Optical and Magnetic Materials

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119Sn and151Eu Mössbauer study of EuBa2(Cu1-xSnx)3O7-y perovskites. / Kuzmann, E.; Homonnay, Z.; Vértes, A.; Kirschner, I.; Gál, M.; Torkos, K.; Csákvári, B.; Solymos, K.; Horváth, G.; Bánkuti, J.; Korecz, L.

In: Hyperfine Interactions, Vol. 46, No. 1-4, 03.1989, p. 747-752.

Research output: Contribution to journalArticle

Kuzmann, E, Homonnay, Z, Vértes, A, Kirschner, I, Gál, M, Torkos, K, Csákvári, B, Solymos, K, Horváth, G, Bánkuti, J & Korecz, L 1989, '119Sn and151Eu Mössbauer study of EuBa2(Cu1-xSnx)3O7-y perovskites', Hyperfine Interactions, vol. 46, no. 1-4, pp. 747-752. https://doi.org/10.1007/BF02398268
Kuzmann, E. ; Homonnay, Z. ; Vértes, A. ; Kirschner, I. ; Gál, M. ; Torkos, K. ; Csákvári, B. ; Solymos, K. ; Horváth, G. ; Bánkuti, J. ; Korecz, L. / 119Sn and151Eu Mössbauer study of EuBa2(Cu1-xSnx)3O7-y perovskites. In: Hyperfine Interactions. 1989 ; Vol. 46, No. 1-4. pp. 747-752.
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AU - Homonnay, Z.

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AU - Kirschner, I.

AU - Gál, M.

AU - Torkos, K.

AU - Csákvári, B.

AU - Solymos, K.

AU - Horváth, G.

AU - Bánkuti, J.

AU - Korecz, L.

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AB - Eu and Sn Mössbauer spectroscopy was used to study EuBa2(Cu1-xSnx)3O7-y metallic oxides. The spectra are characteristic for EuIII and SnIV states in all cases. The existence of at least two different Sn states was determined by decomposition of the Sn Mössbauer spectra. These Sn sites can be associated with nonequivalent Cu sites replaced by Sn atoms in the perovskite type lattice. Anomalous changes were observed in the isomer shifts and area fractions in the spectra measured at room temperature and at 77 K. It can be interpreted assuming low temperature phase transformation and phonon softening. Time dependent changes were found in the Sn spectra recorded at 77 K in the case of highest Sn concentration. The observed changes are consistent with a transitional stage of the low temperature phase transformation.

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