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Moessbauer effect study of hyperfine interaction of /sup 161/Dy and /sup 151/Eu in tungsten bronzes Dysub(0. 18) WO/sub 3/ and Eusub(0. 18) WO/sub 3/

Technical Report:

Abstract

The Moessbauer technique was used to investigate the hyperfine interaction of /sup 161/Dy and /sup 151/Eu in cubic rare earth tungsten bronzes: Dysub(0.18)WO/sub 3/ and Eusub(0.18)WO/sub 3/. Well resolved hfs spectrum was obtained at 4.2 K for Dysub(0.18)WO/sub 3/. The effective hf field approximation sufficed to interpret the spectrum. The obtained hyperfine interaction parameters were: -g/sub 0/..beta..sub(N)Hsub(eff)=(805+-19) Mc/s and e/sup 2/qQ/sub 0//4 = (506+-56) Mc/s. These results imply that ground doublet of Dy/sup +3/ ion in bronze is a Kramers doublet Vertical Bar+-15/2> with asymmetrical hyperfine tensor Asub(z) non equal to 0, Asub(x) = Asub(y) = 0 and that local crystalline field at RE metal in tungsten bronze at 4.2 K cannot be cubic. From ME absorption spectra of Eusub(0.18)WO/sub 3/ taken at 4.2 K, 78 K and 300 K the values of quadrupole interaction constants for bronze lattice and its temperature dependence were obtained. These data indicate that a phase transition from the high temperature ideal perovskite structure to a distorted one occurs in RE bronzes and that the distortion concerns the nearest tungsten-oxygen environment of RE ion.
Authors:
Publication Date:
Jan 01, 1979
Product Type:
Technical Report
Report Number:
INR-1797/2/PS/A
Reference Number:
AIX-11-550207; EDB-81-092571
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DYSPROSIUM 161; HYPERFINE STRUCTURE; EUROPIUM 151; CRYSTAL LATTICES; DYSPROSIUM COMPLEXES; EUROPIUM COMPLEXES; MOESSBAUER EFFECT; PEROVSKITE; STRUCTURAL CHEMICAL ANALYSIS; TEMPERATURE DEPENDENCE; TUNGSTEN OXIDES; ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CALCIUM OXIDES; CHALCOGENIDES; COMPLEXES; CRYSTAL STRUCTURE; DYSPROSIUM ISOTOPES; EUROPIUM ISOTOPES; EVEN-ODD NUCLEI; INTERMEDIATE MASS NUCLEI; ISOTOPES; MINERALS; NUCLEI; ODD-EVEN NUCLEI; OXIDES; OXYGEN COMPOUNDS; PEROVSKITES; RARE EARTH COMPLEXES; RARE EARTH ISOTOPES; RARE EARTH NUCLEI; STABLE ISOTOPES; TITANIUM COMPOUNDS; TITANIUM OXIDES; TRANSITION ELEMENT COMPOUNDS; TUNGSTEN COMPOUNDS; 360104* - Metals & Alloys- Physical Properties; 656000 - Condensed Matter Physics
OSTI ID:
6325979
Research Organizations:
Institute of Nuclear Physics, Krakow (Poland)
Country of Origin:
Poland
Language:
English
Availability:
Energetics and Atomic Energy Information Centre, Warsaw, Poland.
Submitting Site:
INIS
Size:
Pages: 17
Announcement Date:

Technical Report:

Citation Formats

Kisynska, K. Moessbauer effect study of hyperfine interaction of /sup 161/Dy and /sup 151/Eu in tungsten bronzes Dysub(0. 18) WO/sub 3/ and Eusub(0. 18) WO/sub 3/. Poland: N. p., 1979. Web.
Kisynska, K. Moessbauer effect study of hyperfine interaction of /sup 161/Dy and /sup 151/Eu in tungsten bronzes Dysub(0. 18) WO/sub 3/ and Eusub(0. 18) WO/sub 3/. Poland.
Kisynska, K. 1979. "Moessbauer effect study of hyperfine interaction of /sup 161/Dy and /sup 151/Eu in tungsten bronzes Dysub(0. 18) WO/sub 3/ and Eusub(0. 18) WO/sub 3/." Poland.
@misc{etde_6325979,
title = {Moessbauer effect study of hyperfine interaction of /sup 161/Dy and /sup 151/Eu in tungsten bronzes Dysub(0. 18) WO/sub 3/ and Eusub(0. 18) WO/sub 3/}
author = {Kisynska, K}
abstractNote = {The Moessbauer technique was used to investigate the hyperfine interaction of /sup 161/Dy and /sup 151/Eu in cubic rare earth tungsten bronzes: Dysub(0.18)WO/sub 3/ and Eusub(0.18)WO/sub 3/. Well resolved hfs spectrum was obtained at 4.2 K for Dysub(0.18)WO/sub 3/. The effective hf field approximation sufficed to interpret the spectrum. The obtained hyperfine interaction parameters were: -g/sub 0/..beta..sub(N)Hsub(eff)=(805+-19) Mc/s and e/sup 2/qQ/sub 0//4 = (506+-56) Mc/s. These results imply that ground doublet of Dy/sup +3/ ion in bronze is a Kramers doublet Vertical Bar+-15/2> with asymmetrical hyperfine tensor Asub(z) non equal to 0, Asub(x) = Asub(y) = 0 and that local crystalline field at RE metal in tungsten bronze at 4.2 K cannot be cubic. From ME absorption spectra of Eusub(0.18)WO/sub 3/ taken at 4.2 K, 78 K and 300 K the values of quadrupole interaction constants for bronze lattice and its temperature dependence were obtained. These data indicate that a phase transition from the high temperature ideal perovskite structure to a distorted one occurs in RE bronzes and that the distortion concerns the nearest tungsten-oxygen environment of RE ion.}
place = {Poland}
year = {1979}
month = {Jan}
}