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Title: Crystal structure of DyBa/sub 2/Cu/sub 4/O/sub 8/: A new 77 K bulk superconductor

Abstract

Single-crystal x-ray diffraction data from DyBa/sub 2/Cu/sub 4/O/sub 8/ are used to confirm the structure of RBa/sub 2/Cu/sub 4/O/sub 8/ (R = Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, and Tm), all of which have been synthesized in bulk and display substantial Meissner diamagnetism. The structure is orthorhombic, space group Ammm, with a = 3.846 3(3), b = 3.872 6(3), and c = 27.237(2) A. Copper-oxygen layers parallel to (001) are dimpled as in the 1-2-3 structure. Unique copper-oxygen strips parallel to (100) have copper in distorted square-planar coordination. Magnitudes of oxygen anisotropic thermal vibrations are significantly less than in the 1-2-3 structure; thus the oxygen content of 1-2-4 is expected to be significantly more stable.

Authors:
; ;
Publication Date:
Research Org.:
Geophysical Laboratory, Carnegie Institution of Washington, 2801 Upton Street NW, Washington, DC 20008-3898
OSTI Identifier:
6419786
Resource Type:
Journal Article
Journal Name:
Appl. Phys. Lett.; (United States)
Additional Journal Information:
Journal Volume: 54:11
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BARIUM OXIDES; ORTHORHOMBIC LATTICES; COPPER OXIDES; DYSPROSIUM OXIDES; ERBIUM OXIDES; EUROPIUM OXIDES; GADOLINIUM OXIDES; HOLMIUM OXIDES; NEODYMIUM OXIDES; SAMARIUM OXIDES; THULIUM OXIDES; YTTRIUM OXIDES; CRYSTAL STRUCTURE; EXPERIMENTAL DATA; LAYERS; LOW TEMPERATURE; STOICHIOMETRY; SUPERCONDUCTIVITY; X-RAY DIFFRACTION; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; COPPER COMPOUNDS; CRYSTAL LATTICES; DATA; DIFFRACTION; DYSPROSIUM COMPOUNDS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ERBIUM COMPOUNDS; EUROPIUM COMPOUNDS; GADOLINIUM COMPOUNDS; HOLMIUM COMPOUNDS; INFORMATION; NEODYMIUM COMPOUNDS; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SAMARIUM COMPOUNDS; SCATTERING; THULIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; 360202* - Ceramics, Cermets, & Refractories- Structure & Phase Studies; 360204 - Ceramics, Cermets, & Refractories- Physical Properties; 656100 - Condensed Matter Physics- Superconductivity

Citation Formats

Hazen, R M, Finger, L W, and Morris, D E. Crystal structure of DyBa/sub 2/Cu/sub 4/O/sub 8/: A new 77 K bulk superconductor. United States: N. p., 1989. Web. doi:10.1063/1.101424.
Hazen, R M, Finger, L W, & Morris, D E. Crystal structure of DyBa/sub 2/Cu/sub 4/O/sub 8/: A new 77 K bulk superconductor. United States. https://doi.org/10.1063/1.101424
Hazen, R M, Finger, L W, and Morris, D E. 1989. "Crystal structure of DyBa/sub 2/Cu/sub 4/O/sub 8/: A new 77 K bulk superconductor". United States. https://doi.org/10.1063/1.101424.
@article{osti_6419786,
title = {Crystal structure of DyBa/sub 2/Cu/sub 4/O/sub 8/: A new 77 K bulk superconductor},
author = {Hazen, R M and Finger, L W and Morris, D E},
abstractNote = {Single-crystal x-ray diffraction data from DyBa/sub 2/Cu/sub 4/O/sub 8/ are used to confirm the structure of RBa/sub 2/Cu/sub 4/O/sub 8/ (R = Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, and Tm), all of which have been synthesized in bulk and display substantial Meissner diamagnetism. The structure is orthorhombic, space group Ammm, with a = 3.846 3(3), b = 3.872 6(3), and c = 27.237(2) A. Copper-oxygen layers parallel to (001) are dimpled as in the 1-2-3 structure. Unique copper-oxygen strips parallel to (100) have copper in distorted square-planar coordination. Magnitudes of oxygen anisotropic thermal vibrations are significantly less than in the 1-2-3 structure; thus the oxygen content of 1-2-4 is expected to be significantly more stable.},
doi = {10.1063/1.101424},
url = {https://www.osti.gov/biblio/6419786}, journal = {Appl. Phys. Lett.; (United States)},
number = ,
volume = 54:11,
place = {United States},
year = {Mon Mar 13 00:00:00 EST 1989},
month = {Mon Mar 13 00:00:00 EST 1989}
}