Fe-Gd magnetic interactions in GdBa[sub 2]Cu[sub 2. 7]Fe[sub 0. 3]O[sub 7[minus][delta]]
Journal Article
·
· Physical Review, B: Condensed Matter; (United States)
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
- Francis Bitter National Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
The [sup 57]Fe magnetic hyperfine interactions in GdBa[sub 2]Cu[sub 2.7]Fe[sub 0.3]O[sub 7[minus][delta]] associated with iron in the Cu(II) plane site exhibit temperature-dependent behavior suggesting a crossover in magnetic dimensionality as compared with Y-based 1:2:3 compounds of similar levels of iron doping and degree of oxygenation. It is proposed that oxygen-mediated Fe-Gd exchange interactions are responsible for the appearance of three-dimensional magnetic behavior and a concomitant decrease in [ital T][sub [ital c]] with eventual loss of superconductivity in samples prepared under conditions that favor maximum Cu(II) plane-site iron occupation. For the level of Fe doping used, the random Fe substitution on Cu(II) sites and the presence of the Gd ions between adjacent Cu(II) planes lead to an unusual situation of stronger interplanar and weaker intraplanar magnetic interactions.
- DOE Contract Number:
- FG02-84ER45174
- OSTI ID:
- 6838050
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 47:6; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRONIC STRUCTURE
EVEN-ODD NUCLEI
GADOLINIUM COMPOUNDS
GADOLINIUM OXIDES
HIGH-TC SUPERCONDUCTORS
HYPERFINE STRUCTURE
INTERMEDIATE MASS NUCLEI
IRON 57
IRON COMPOUNDS
IRON ISOTOPES
IRON OXIDES
ISOTOPES
MOESSBAUER EFFECT
NUCLEI
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
STABLE ISOTOPES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRONIC STRUCTURE
EVEN-ODD NUCLEI
GADOLINIUM COMPOUNDS
GADOLINIUM OXIDES
HIGH-TC SUPERCONDUCTORS
HYPERFINE STRUCTURE
INTERMEDIATE MASS NUCLEI
IRON 57
IRON COMPOUNDS
IRON ISOTOPES
IRON OXIDES
ISOTOPES
MOESSBAUER EFFECT
NUCLEI
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
STABLE ISOTOPES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS