Application of151Eu Mössbauer spectroscopy to studies of electric field gradients in high-temperature superconductors

J. Lindén*, T. Karlemo, M. Karppinen, T. Katila, M. Lippmaa, A. Nara, L. Niinistö, I. Tittonen, K. Ullakko, H. Yamauchi

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The rare-earth site of samples having the compositions (Fe,Cu)Sr2(Eu,Ce)nCu2O4+2 n+z (n=2 and 3) were studied by151Eu Mössbauer spectroscopy. The results obtained are compared with measurements of EuBa2Cu3O7-δ (1:2:3) and Bi2Sr2(Ca1-yEuy)Cu2O8+E (2:2:1:2) samples. The full quadrupole Hamiltonian of the 21.5-keV γ-transition was applied in analyzing the measured spectra. Simultaneous fitting of spectra recorded from crystallites oriented in various directions was used to determine the hyperfine parameters of the n= 2 and 3 samples. Two different electric field gradients, not discernible in simple random crystallite measurements, were obtained for the n=3 series.

Original languageEnglish
Pages (from-to)1635-1639
Number of pages5
JournalHyperfine Interactions
Volume93
Issue number1
DOIs
Publication statusPublished - Dec 1994
MoE publication typeA1 Journal article-refereed

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