Preparation and Physical Properties of (PrxY1-x)1+δBa2-δCu3Oy
- 1 January 1988
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 27 (1A), L41
- https://doi.org/10.1143/jjap.27.l41
Abstract
The Pr-Y solid-solution of the “1-2-3” crystal structure is expressed as (Pr x Y1-x )1+δBa2-δCu3O y , with δ ranging from 0 (x=0) to 0.06 (x=1); a small percentage of the Ba sites are occupied by Pr ions. This Pr-Y solid-solution for x>0.5 is nonsuperconducting and does not show metallic conduction. At the metal-semiconductor boundary (x=0.5), the average valence of the Cu ion is smaller by only ca. 0.1 than that of the 90 K superconductor YBa2Cu3O7 (x=0). The relation between the lattice parameters and ionic radii at the Y site is completely different from the empirical relation obtained so far for REBa2Cu3O y crystals (RE=Y and trivalent lanthanide elements).Keywords
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