APPLICATION OF EU-151 MOSSBAUER-SPECTROSCOPY TO STUDIES OF ELECTRIC-FIELD GRADIENTS IN HIGH-TEMPERATURE SUPERCONDUCTORS

Authors
LINDEN J KARLEMO T KARPPINEN M KATILA T LIPPMAA M NARA A NIINISTO L TITTONEN I ULLAKKO K YAMAUCHI H
Citation
J. Linden et al., APPLICATION OF EU-151 MOSSBAUER-SPECTROSCOPY TO STUDIES OF ELECTRIC-FIELD GRADIENTS IN HIGH-TEMPERATURE SUPERCONDUCTORS, Hyperfine interactions, 93(1-4), 1994, pp. 1635-1639
Citations number
9
Categorie Soggetti
Physics, Atomic, Molecular & Chemical","Physics, Nuclear","Physics, Condensed Matter
Journal title
Hyperfine interactions → ACNP
ISSN journal
03043843
Volume
93
Issue
1-4
Year of publication
1994
Pages
1635 - 1639
Database
ISI
SICI code
0304-3843(1994)93:1-4<1635:AOEMTS>2.0.ZU;2-D
Abstract
The rare-earth site of samples having the compositions (Fe,Cu)Sr-2(Eu, Ce)(n)Cu2O4+2n+z (n = 2 and 3) were studied by Eu-151 Mossbauer spect roscopy. The results obtained are compared with measurements of EuBa2C u3O7-delta (1:2:3) and Bi2Sr2(Ca1-yEuy)Cu2O8+epsilon (2:2:1:2) samples . The full quadrupole Hamiltonian of the 21.5-keV gamma-transition was applied in analyzing the measured spectra. Simultaneous fitting of sp ectra recorded from crystallites oriented in various directions was us ed to determine the hyperfine parameters of the n = 2 and 3 samples. T wo different electric field gradients, not discernible in simple rando m crystallite measurements, were obtained for the n = 3 series.