Temperature dependence of the local structure of YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ with varying oxygen content: An x-ray-absorption study

Boyce, J B; Bridges, F; Claeson, T; Nygren, M

doi:10.1103/PhysRevB.39.6555

Title: Temperature dependence of the local structure of YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ with varying oxygen content: An x-ray-absorption study

Full Record
Other Related Research

Abstract

The local structure of YBa/sub 2/Cu/sub 3/O/sub y/ determined using x-ray-absorption fine structure (XAFS) agrees well with the long-range order given by diffraction results for both oxygen-rich, orthorhombic (y = 6.98 and 6.87) and oxygen-deficient, tetragonal (y = 6.15) compounds. The x-ray-absorption near-edge structure supports the conclusion that, as y = 7 goes to y = 6, the O is removed from the chains and the chain Cu atoms, Cu(1), becomes monovalent with a linear O-Cu-O structural configuration and a 3d/sup 10/ electronic configuration, as in Cu/sub 2/O. For the XAFS analysis, structural standards were determined, and these standards worked well not only for the Cu first-neighbor O environment but also for the Cu second-neighbor metal-atom environment out to 4 A. A detailed multipeak analysis reproduced the XAFS spectra well and yielded structural parameters that agree with diffraction. The temperature dependence of the structural parameters shows only a smooth variation, with no significant anomalies. The Cu-X distances have a negligible to a small positive change with temperature, consistent with the lattice expansion. The exception is the Cu-Ba distances which change substantially; the Cu(1)-Ba distance increases and the Cu(2)-Ba distance decreases. This indicates that the Ba moves away from the Cu(1)-Omore »« less

Authors:: Boyce, J B; Bridges, F; Claeson, T; Nygren, M

Publication Date:: Sat Apr 01 00:00:00 EST 1989

Research Org.:: Xerox Palo Alto Research Center, Palo Alto, California 94304

OSTI Identifier:: 6408453

Resource Type:: Journal Article

Journal Name:: Phys. Rev. B: Condens. Matter; (United States)

Additional Journal Information:: Journal Volume: 39:10

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BARIUM OXIDES; CRYSTAL STRUCTURE; TEMPERATURE DEPENDENCE; COPPER OXIDES; YTTRIUM OXIDES; ABSORPTION SPECTROSCOPY; CRYSTAL-PHASE TRANSFORMATIONS; ELECTRONIC STRUCTURE; HIGH TEMPERATURE; LOW TEMPERATURE; MEDIUM TEMPERATURE; ONE-DIMENSIONAL CALCULATIONS; ORTHORHOMBIC LATTICES; PEROVSKITES; QUANTITY RATIO; STOICHIOMETRY; STRUCTURAL CHEMICAL ANALYSIS; SUPERCONDUCTORS; TETRAGONAL LATTICES; TRANSITION TEMPERATURE; TWO-DIMENSIONAL CALCULATIONS; ULTRALOW TEMPERATURE; VERY LOW TEMPERATURE; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTAL LATTICES; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PHYSICAL PROPERTIES; SPECTROSCOPY; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; 360202* - Ceramics, Cermets, & Refractories- Structure & Phase Studies; 656100 - Condensed Matter Physics- Superconductivity

Citation Formats


                    Boyce, J B, Bridges, F, Claeson, T, and Nygren, M. Temperature dependence of the local structure of YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ with varying oxygen content: An x-ray-absorption study.  United States: N. p., 1989. 
        Web.  doi:10.1103/PhysRevB.39.6555.

Copy to clipboard


                    Boyce, J B, Bridges, F, Claeson, T, & Nygren, M. Temperature dependence of the local structure of YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ with varying oxygen content: An x-ray-absorption study.  United States.  https://doi.org/10.1103/PhysRevB.39.6555

Copy to clipboard


                    Boyce, J B, Bridges, F, Claeson, T, and Nygren, M. 1989.  
        "Temperature dependence of the local structure of YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ with varying oxygen content: An x-ray-absorption study".  United States.  https://doi.org/10.1103/PhysRevB.39.6555.

Copy to clipboard


                    
@article{osti_6408453,

  title        = {Temperature dependence of the local structure of YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ with varying oxygen content: An x-ray-absorption study},

  author       = {Boyce, J B and Bridges, F and Claeson, T and Nygren, M},

  abstractNote = {The local structure of YBa/sub 2/Cu/sub 3/O/sub y/ determined using x-ray-absorption fine structure (XAFS) agrees well with the long-range order given by diffraction results for both oxygen-rich, orthorhombic (y = 6.98 and 6.87) and oxygen-deficient, tetragonal (y = 6.15) compounds. The x-ray-absorption near-edge structure supports the conclusion that, as y = 7 goes to y = 6, the O is removed from the chains and the chain Cu atoms, Cu(1), becomes monovalent with a linear O-Cu-O structural configuration and a 3d/sup 10/ electronic configuration, as in Cu/sub 2/O. For the XAFS analysis, structural standards were determined, and these standards worked well not only for the Cu first-neighbor O environment but also for the Cu second-neighbor metal-atom environment out to 4 A. A detailed multipeak analysis reproduced the XAFS spectra well and yielded structural parameters that agree with diffraction. The temperature dependence of the structural parameters shows only a smooth variation, with no significant anomalies. The Cu-X distances have a negligible to a small positive change with temperature, consistent with the lattice expansion. The exception is the Cu-Ba distances which change substantially; the Cu(1)-Ba distance increases and the Cu(2)-Ba distance decreases. This indicates that the Ba moves away from the Cu(1)-O chains and toward the Cu(2)-O planes with increasing temperature and that anharmonicity plays a role. This motion is larger for the oxygen-depleted compound than for the fully oxygenated material. The in-plane Cu-O first-neighbor vibrations exhibit no significant softening with temperature.},

  doi          = {10.1103/PhysRevB.39.6555},

  url          = {https://www.osti.gov/biblio/6408453},
  journal      = {Phys. Rev. B: Condens. Matter; (United States)},
number       = ,

  volume       = 39:10,

  place        = {United States},

  year         = {Sat Apr 01 00:00:00 EST 1989},

  month        = {Sat Apr 01 00:00:00 EST 1989}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1103/PhysRevB.39.6555

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Distorted chain sites for Co- and Fe-substituted YBa/sub 2/Cu/sub 3/O/sub 7/minus/delta/

Journal Article Bridges, F; Boyce, J; Claeson, T; ... - Phys. Rev. B: Condens. Matter; (United States)

We present x-ray-absorption fine-structure (XAFS) measurements for a series of Co- and Fe-substituted samples of YBa/sub 2/Cu/sub 3/O/sub 7/minus/delta/(Y-Ba-Cu-O). Our analysis of the first- and second-neighbor environments indicates that the Co atoms primarily replace the Cu in the chain sites, the Cu(1) atoms, in Y-Ba-Cu-O, but many of these Co(1) sites and their neighboring oxygen sites are highly distorted. The first-neighbor Co-O peak consists of /similar to/3.5 oxygen at 1.8 A and /similar to/1.3 oxygen at 2.4 A, while the second-neighbor multipeak in the XAFS data is unexpectedly low in amplitude. Structure in this peak is inconsistent with a simplemore »« less
https://doi.org/10.1103/PhysRevB.39.11603
X-ray-absorption studies of YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ and GdBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ superconductors

Journal Article Boyce, J; Bridges, F; Claeson, T; ... - Phys. Rev. B: Condens. Matter; (United States)

X-ray-absorption measurements of the high-T/sub c/ superconductors YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ and GdBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ show that their near edge and extended fine structures (EXAFS) are essentially identical over the temperature range of 4.2 to 688 K. The results indicate that not only are YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ and GdBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ very similar to each other in local bonding and electronic structure, but also remain virtually unchanged, electronically and structurally, over this wide range in temperature, from far below to well above T/sub c/. The positions of the Cu near-edge spectra for thesemore »« less
https://doi.org/10.1103/PhysRevB.36.5251
Local structure study about Co in YBa{sub 2}(Cu{sub 1{minus}{ital x}}Co{sub {ital x}}){sub 3}O{sub 7{minus}{delta}} thin films using polarized XAFS

Journal Article Bauer, E; Bridges, F; Booth, C; ... - Physical Review, B: Condensed Matter

We have studied the local structure around Co in YBa{sub 2}(Cu{sub 1{minus}{ital x}}Co{sub {ital x}}){sub 3}O{sub 7{minus}{delta}} {ital c}-axis oriented thin films with three different concentrations: {ital x}=0.07, 0.10, 0.17, and in a PrBa{sub 2}(Cu{sub 1{minus}{ital x}}Co{sub {ital x}}){sub 3}O{sub 7{minus}{delta}} thin film of concentration {ital x}=0.05 using the x-ray absorption fine structure (XAFS) technique. Data were collected at the Co {ital K} edge with polarizations both parallel and perpendicular to the film surface. We find that the oxygen neighbors are well ordered and shortened in comparison with YBCO Cu-O values to {approximately}1.80 A and 1.88 A in the {italmore »« less
https://doi.org/10.1103/PhysRevB.54.13352
Ni-induced local distortions in La{sub 1.85}Sr{sub 0.15}Cu{sub 1-y}Ni{sub y}O{sub 4} and their relevance to T{sub c} suppression: An angular-resolved XAFS study

Journal Article Haskel, Daniel; Stern, Edward; Polinger, Victor; ... - Physical Review B

We present results from angular-resolved x-ray-absorption fine-structure (XAFS) measurements at the Ni, La, and Sr K edges of oriented powders of La{sub 1.85}Sr{sub 0.15}Cu{sub 1-y}Ni{sub y}O{sub 4}, with y=0.01, 0.03, 0.06. A special magnetic alignment procedure allowed us to measure pure c- and ab-oriented XAFS at the Ni K edge in identical fluorescence geometries. Both the x-ray-absorption near-edge structure and the XAFS unequivocally show that the NiO{sub 6} octahedra are contracted along the c axis by {approx}0.32{angstrom} relative to CuO{sub 6} octahedra while the in-plane distances of NiO{sub 6} and CuO{sub 6} octahedra are the same within 0.01{angstrom}. The NiO{submore »« less
https://doi.org/10.1103/PhysRevB.64.104510
Distorted local environment around Zn on Cu(2) sites in YBa[sub 2]Cu[sub 3]O[sub 7]: An x-ray-absorption study

Journal Article Bridges, F; Li, G; Boyce, J; ... - Physical Review, B: Condensed Matter; (United States)

The substitution of Zn for Cu in YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] (YBCO) causes a surprisingly large suppression of the superconducting transition temperature. However, there has been some controversy as to whether Zn replaces Cu in the CuO[sub 2] plane sites, Cu(2), in the CuO chain sites, Cu(1), or in both sites. We present x-ray-absorption fine-structure (XAFS) data for samples from four different sources with several concentrations of Zn. Our data indicate that, in many samples, much of the Zn resides in ZnO (or ZnO-like) clusters; for some of these samples we have estimated the amount of ZnO present from ourmore »« less
https://doi.org/10.1103/PhysRevB.48.1266

Similar Records