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Title: Pb substitution in the Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} high-T{sub c} superconductor: Cation overdoping

Abstract

We study the effects of Pb substitution in single crystals of the high-temperature superconductor Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}}. We compare Pb-substituted samples with {open_quotes}pure{close_quotes} (unsubstituted) crystals in terms of structure, cation composition, and the temperature dependences of ac susceptibility and Raman scattering. We find that Pb{sup 2+} primarily substitutes for Bi{sup 3+}, leading directly to a T{sub c} reduction characteristic of overdoped samples. We also observe structural changes related to the superlattice modulation along b*. Raman scattering studies indicate that some Pb atoms go to Sr sites. Low-temperature electronic Raman scattering shows further evidence for cation overdoping by comparison with oxygen annealed pure Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}}.

Authors:
; ;  [1]
  1. Naval Research Laboratory, Washington, DC 20375 (United States)
Publication Date:
OSTI Identifier:
550547
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 56; Journal Issue: 22; Other Information: PBD: Dec 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BISMUTH OXIDES; TRANSITION TEMPERATURE; RAMAN SPECTRA; STRONTIUM OXIDES; CALCIUM OXIDES; COPPER OXIDES; HIGH-TC SUPERCONDUCTORS; LEAD COMPOUNDS; MAGNETIC SUSCEPTIBILITY

Citation Formats

Kendziora, C, Qadri, S B, and Skelton, E. Pb substitution in the Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} high-T{sub c} superconductor: Cation overdoping. United States: N. p., 1997. Web. doi:10.1103/PhysRevB.56.14717.
Kendziora, C, Qadri, S B, & Skelton, E. Pb substitution in the Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} high-T{sub c} superconductor: Cation overdoping. United States. https://doi.org/10.1103/PhysRevB.56.14717
Kendziora, C, Qadri, S B, and Skelton, E. 1997. "Pb substitution in the Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} high-T{sub c} superconductor: Cation overdoping". United States. https://doi.org/10.1103/PhysRevB.56.14717.
@article{osti_550547,
title = {Pb substitution in the Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} high-T{sub c} superconductor: Cation overdoping},
author = {Kendziora, C and Qadri, S B and Skelton, E},
abstractNote = {We study the effects of Pb substitution in single crystals of the high-temperature superconductor Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}}. We compare Pb-substituted samples with {open_quotes}pure{close_quotes} (unsubstituted) crystals in terms of structure, cation composition, and the temperature dependences of ac susceptibility and Raman scattering. We find that Pb{sup 2+} primarily substitutes for Bi{sup 3+}, leading directly to a T{sub c} reduction characteristic of overdoped samples. We also observe structural changes related to the superlattice modulation along b*. Raman scattering studies indicate that some Pb atoms go to Sr sites. Low-temperature electronic Raman scattering shows further evidence for cation overdoping by comparison with oxygen annealed pure Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}}.},
doi = {10.1103/PhysRevB.56.14717},
url = {https://www.osti.gov/biblio/550547}, journal = {Physical Review, B: Condensed Matter},
number = 22,
volume = 56,
place = {United States},
year = {1997},
month = {12}
}