The effect of iron concentration and oxygen nonstoichiometry on the properties of YBa sub 2 (Cu sub 1 minus x Fe sub x ) sub 3 O sub 7 minus y

Journal Article · Wed Feb 01 04:00:00 EST 1989 · Superconductivity; (USA)

OSTI ID:6977174

Zubov, I V; Ilushin, A S; Nikanorova, I A; Novakova, A A; Graboi, I E; Kaul', A R; Moshchalkov, V V; Muttik, I G ^[1]

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1. M. V. Lomonosov Moscow State University, Moscow (SU)

The effect of iron ({sup 57}Fe) concentration and oxygen content on the structure parameters and Moessbauer spectra of the YBa{sub 2}(Cu{sub 1{minus}x}Fe{sub x}){sub 3}O{sub 7{minus}y} compound (x=0.01--0.08) was studied by using the Moessbauer effect and x-ray diffraction analysis of polycrystals. It was determined that if {ital x} is constant, the quenching of samples from 350 to 950 {degree}C, which changes the oxygen content, fundamentally changes the relationship between the line intensities and some of the parameters of the partial doublets of Moessbauer spectra. A correlation between the change in these parameters and the lattice parameter radio c/b is established. At the same time, the variation of {ital x} under exactly the same annealing conditions has essentially no effect on the Moessbauer spectrum parameters, even though a structural phase transition from the orthorhombic to the tetragonal phase (in the interval 0.02{lt}x{lt}0.04) occurs in these samples as {ital x} is increased. A correlation between T{sub c} and the unit-Cell parameter c is established.

• OSTI ID: 6977174
• Journal Information: Superconductivity; (USA), Journal Name: Superconductivity; (USA) Vol. 2:2; ISSN SUPRE
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
ANNEALING
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CORRELATIONS
CRYSTALS
DATA
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
HEAT TREATMENTS
INFORMATION
INTERMEDIATE MASS NUCLEI
IRON 57
IRON ADDITIONS
IRON ALLOYS
IRON ISOTOPES
ISOTOPES
LATTICE PARAMETERS
MOESSBAUER EFFECT
NUCLEI
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYCRYSTALS
QUANTITY RATIO
SCATTERING
STABLE ISOTOPES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES