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Crystal Structure of (Cr,Cu)(Sr,La) 2 (La,A)Cu 2 O 8‐δ (1212‐type) and (Cr,Cu)Sr 2 (Y,Ce) 2 Cu 2 O 10‐δ (1222‐type) Phases
Author(s) -
Kuz'micheva G.M.,
Esaulova Yu.V.,
Alsarraf A.H.R.M.,
Andreenko A.S.,
Kostyleva I.E.,
Khlybov E.P.,
Palewski T.
Publication year - 2002
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/1521-4079(200206)37:6<612::aid-crat612>3.0.co;2-5
Subject(s) - cuprate , rietveld refinement , crystal structure , superconductivity , impurity , materials science , electrical resistivity and conductivity , copper , phase (matter) , type (biology) , crystallography , structure type , mineralogy , analytical chemistry (journal) , chemistry , condensed matter physics , metallurgy , physics , geology , paleontology , organic chemistry , chromatography , quantum mechanics
Conditions of the synthesis, crystal structures, mechanical properties, electrical resistivities and magnetizations of cuprates with the general formula (Cr,Cu)(Sr,La) 2 (La,A)Cu 2 O 8‐δ where A=Ca or Sr of 1212‐type and (Cr,Cu)Sr 2 (Y,Ce) 2 Cu 2 O 10‐δ of 1222‐type were investigated. The compositions of the cuprates and an amount of the impurity phases in the samples were determined. Rietveld refinement of the structure was carried out. It was found that the formal charges of Cu (FC Cu ) calculated from the electroneutrality of refined phase compositions do not achieve value optimal for the appearence of superconducting phases.