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Title: Rare-earth ion size effect on resistivity, susceptibility, and superconductivity of {ital R}Ba{sub 2}Cu{sub 3{minus}{ital x}}Zn{sub {ital x}}O{sub 7{minus}{ital y}} ({ital R}= Yb, Er, Y, Dy, Gd, Eu, Sm, and Nd)

Abstract

A systematic study of Zn doping on the resistivity {rho}, dc susceptibility {chi}, and superconducting {ital T}{sub {ital c}} of {ital R}Ba{sub 2}Cu{sub 3{minus}{ital x}}Zn{sub {ital x}}O{sub 7{minus}{ital y}} systems ({ital R}=Yb, Er Y, Dy, Gd, Eu, Sm, and Nd, and 0{le}{ital x}{le}0.3) is reported. X-ray powder diffraction (XRD) shows that all samples consist essentially of a single phase and retain the orthorhombic structure in the range of 0{le}{ital x}{le}0.3 (except for {ital R}=Yb in the range of 0{le}{ital x}{le}0.15). By analyzing our Raman spectra and XRD data, Zn atoms are found more likely to substitute on Cu(2) sites. Doping with Zn on the Cu site in these systems causes a rapid nearly linear decrease of {ital T}{sub {ital c}} as Zn content increases. The reduction of {ital T}{sub {ital c}} for {ital R}Ba{sub 2}Cu{sub 3{minus}{ital x}}Zn{sub {ital x}}O{sub 7{minus}{ital y}} is found to depend strongly on the ionic radius of the rare-earth element {ital R}. This effect resembles the ion size effect on {ital T}{sub {ital c}} in {ital R}{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{ital y}}, where Pr substitutes on the {ital R} site, and in {ital R}Ba{sub 2}Cu{sub 3{minus}{ital x}}Ga{sub {ital x}}O{sub 7{minus}{ital y}}, where Gamore » substitutes on the Cu(1) sites in Cu-O chains, although in the {ital R}Ba{sub 2}Cu{sub 3{minus}{ital x}}Zn{sub {ital x}}O{sub 7{minus}{ital y}} systems Zn is found to be more likely to substitute on the Cu(2) sites in Cu-O{sub 2} planes. The suppression of superconductivity by zinc and the rare-earth ion size effect on {ital T}{sub {ital c}} in these systems is interpreted in terms of a Mott spin bipolaron model. {copyright} {ital 1996 The American Physical Society.}« less

Authors:
; ; ;  [1]
  1. Institut fuer Schicht- und Ionentechnik, Forschungszentrum Juelich Gesellschaft mit beschraenkter Haftung, Postfach 1913, D-52425 Juelich (Germany)
Publication Date:
OSTI Identifier:
284706
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 53; Journal Issue: 22; Other Information: PBD: Jun 1996
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; HIGH-TC SUPERCONDUCTORS; ELECTRIC CONDUCTIVITY; MAGNETIC SUSCEPTIBILITY; RARE EARTH COMPOUNDS; YTTRIUM OXIDES; BARIUM OXIDES; COPPER OXIDES; ZINC OXIDES; TRANSITION TEMPERATURE; TEMPERATURE DEPENDENCE; ELECTRONIC STRUCTURE; POLARONS; SUBSTITUTION

Citation Formats

Xu, Y, Ata-Allah, S S, Berger, M G, and Glueck, O. Rare-earth ion size effect on resistivity, susceptibility, and superconductivity of {ital R}Ba{sub 2}Cu{sub 3{minus}{ital x}}Zn{sub {ital x}}O{sub 7{minus}{ital y}} ({ital R}= Yb, Er, Y, Dy, Gd, Eu, Sm, and Nd). United States: N. p., 1996. Web. doi:10.1103/PhysRevB.53.15245.
Xu, Y, Ata-Allah, S S, Berger, M G, & Glueck, O. Rare-earth ion size effect on resistivity, susceptibility, and superconductivity of {ital R}Ba{sub 2}Cu{sub 3{minus}{ital x}}Zn{sub {ital x}}O{sub 7{minus}{ital y}} ({ital R}= Yb, Er, Y, Dy, Gd, Eu, Sm, and Nd). United States. doi:10.1103/PhysRevB.53.15245.
Xu, Y, Ata-Allah, S S, Berger, M G, and Glueck, O. Sat . "Rare-earth ion size effect on resistivity, susceptibility, and superconductivity of {ital R}Ba{sub 2}Cu{sub 3{minus}{ital x}}Zn{sub {ital x}}O{sub 7{minus}{ital y}} ({ital R}= Yb, Er, Y, Dy, Gd, Eu, Sm, and Nd)". United States. doi:10.1103/PhysRevB.53.15245.
@article{osti_284706,
title = {Rare-earth ion size effect on resistivity, susceptibility, and superconductivity of {ital R}Ba{sub 2}Cu{sub 3{minus}{ital x}}Zn{sub {ital x}}O{sub 7{minus}{ital y}} ({ital R}= Yb, Er, Y, Dy, Gd, Eu, Sm, and Nd)},
author = {Xu, Y and Ata-Allah, S S and Berger, M G and Glueck, O},
abstractNote = {A systematic study of Zn doping on the resistivity {rho}, dc susceptibility {chi}, and superconducting {ital T}{sub {ital c}} of {ital R}Ba{sub 2}Cu{sub 3{minus}{ital x}}Zn{sub {ital x}}O{sub 7{minus}{ital y}} systems ({ital R}=Yb, Er Y, Dy, Gd, Eu, Sm, and Nd, and 0{le}{ital x}{le}0.3) is reported. X-ray powder diffraction (XRD) shows that all samples consist essentially of a single phase and retain the orthorhombic structure in the range of 0{le}{ital x}{le}0.3 (except for {ital R}=Yb in the range of 0{le}{ital x}{le}0.15). By analyzing our Raman spectra and XRD data, Zn atoms are found more likely to substitute on Cu(2) sites. Doping with Zn on the Cu site in these systems causes a rapid nearly linear decrease of {ital T}{sub {ital c}} as Zn content increases. The reduction of {ital T}{sub {ital c}} for {ital R}Ba{sub 2}Cu{sub 3{minus}{ital x}}Zn{sub {ital x}}O{sub 7{minus}{ital y}} is found to depend strongly on the ionic radius of the rare-earth element {ital R}. This effect resembles the ion size effect on {ital T}{sub {ital c}} in {ital R}{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{ital y}}, where Pr substitutes on the {ital R} site, and in {ital R}Ba{sub 2}Cu{sub 3{minus}{ital x}}Ga{sub {ital x}}O{sub 7{minus}{ital y}}, where Ga substitutes on the Cu(1) sites in Cu-O chains, although in the {ital R}Ba{sub 2}Cu{sub 3{minus}{ital x}}Zn{sub {ital x}}O{sub 7{minus}{ital y}} systems Zn is found to be more likely to substitute on the Cu(2) sites in Cu-O{sub 2} planes. The suppression of superconductivity by zinc and the rare-earth ion size effect on {ital T}{sub {ital c}} in these systems is interpreted in terms of a Mott spin bipolaron model. {copyright} {ital 1996 The American Physical Society.}},
doi = {10.1103/PhysRevB.53.15245},
journal = {Physical Review, B: Condensed Matter},
number = 22,
volume = 53,
place = {United States},
year = {1996},
month = {6}
}