Investigations of the Pb2Sr2Y1-xEuxCu3O 8+δ system by 151Eu Mössbauer resonance and x-ray diffraction

J. Lindén*, M. Lippmaa, T. Karlemo, M. Karppinen, L. Niinistö

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

A series of non-superconducting Pb2Sr2Y1-xEUxCu3O 8+δ (Pb-2213) samples with x = 0, 0.25, 0.5, 0.75 and 1.00 were synthesized under a nitrogen atmosphere. Both as-synthesized and oxygen-annealed samples were studied. The phase purity, lattice parameters, and crystal structure were analysed by x-ray diffraction measurements. The behaviour of the crystallites in a magnetic field was studied by performing grain alignment experiments on some of the samples. Replacing Y with Eu increased the unit-cell volume and changed the preferred direction of the c axes in orienting experiments. The oxygen-loaded samples were tetragonal. The hyperfine interactions of the rare-earth site were monitored using 151Eu Mössbauer spectroscopy. The spectra obtained exhibited electric quadrupole interaction as expected. The asymmetry parameter (η) of the electric field gradient (efg) exhibited a strong dependence on x. For the as-synthesized x = 1.0 sample η was zero.

Original languageEnglish
Pages (from-to)399-404
Number of pages6
JournalSuperconductor Science and Technology
Volume9
Issue number5
DOIs
Publication statusPublished - May 1996
MoE publication typeA1 Journal article-refereed

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