Valence determination in high T/sub c/ oxide superconductors by XANES (X-ray Absorption Near Edge Structure) and Moessbauer spectroscopy. [La/sub 2-x/(Sr,Eu)/sub x/CuO/sub 4/; (Y,Gd,Pr)Ba/sub 2/Cu/sub 3/O/sub 7-delta/]

Alp, E E; Soderholm, L; Shenoy, G K; Hinks, D G; Veal, B W; Montano, P A

Title: Valence determination in high T/sub c/ oxide superconductors by XANES (X-ray Absorption Near Edge Structure) and Moessbauer spectroscopy. [La/sub 2-x/(Sr,Eu)/sub x/CuO/sub 4/; (Y,Gd,Pr)Ba/sub 2/Cu/sub 3/O/sub 7-delta/]

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Abstract

The question of valence of Cu and rare-earth atoms in the newly discovered oxide superconductors with high transition temperatures is crucial to the understanding of their electronic structure. X-Ray Absorption Near Edge Structure and Moessbauer Spectroscopy were used to measure the valence of Cu, Pr, Eu, and Gd in La/sub 2-x/(Sr,Eu)/sub x/CuO/sub 4/ and (Y,Gd,Pr)Ba/sub 2/Cu/sub 3/O/sub 7-delta/. Results are presented, and the Cu valence as a function of oxygen concentration is discussed. 18 refs., 6 figs.

Authors:: Alp, E E; Soderholm, L; Shenoy, G K; Hinks, D G; Veal, B W; Montano, P A

Publication Date:: Tue Sep 01 00:00:00 EDT 1987

Research Org.:: Argonne National Lab., IL (USA); City Univ. of New York, NY (USA)

OSTI Identifier:: 5848506

Report Number(s):: CONF-870843-3
ON: DE88003100

DOE Contract Number:: W-31109-ENG-38

Resource Type:: Conference

Resource Relation:: Conference: International conference on electronic structure in phase stability in advanced ceramics, Argonne, IL, USA, 17 Aug 1987; Other Information: Portions of this document are illegible in microfiche products

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BARIUM OXIDES; ELECTRONIC STRUCTURE; VALENCE; COPPER OXIDES; EUROPIUM OXIDES; GADOLINIUM OXIDES; LANTHANUM OXIDES; PRASEODYMIUM OXIDES; STRONTIUM OXIDES; YTTRIUM OXIDES; CRYSTAL STRUCTURE; ENERGY-LEVEL TRANSITIONS; MAGNETIC PROPERTIES; MOESSBAUER EFFECT; PHASE TRANSFORMATIONS; SUPERCONDUCTORS; TRANSITION TEMPERATURE; X-RAY SPECTRA; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; EUROPIUM COMPOUNDS; GADOLINIUM COMPOUNDS; LANTHANUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; PRASEODYMIUM COMPOUNDS; RARE EARTH COMPOUNDS; SPECTRA; STRONTIUM COMPOUNDS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; 360204* - Ceramics, Cermets, & Refractories- Physical Properties; 656100 - Condensed Matter Physics- Superconductivity; 656002 - Condensed Matter Physics- General Techniques in Condensed Matter- (1987-)

Citation Formats


                    Alp, E E, Soderholm, L, Shenoy, G K, Hinks, D G, Veal, B W, and Montano, P A. Valence determination in high T/sub c/ oxide superconductors by XANES (X-ray Absorption Near Edge Structure) and Moessbauer spectroscopy. [La/sub 2-x/(Sr,Eu)/sub x/CuO/sub 4/; (Y,Gd,Pr)Ba/sub 2/Cu/sub 3/O/sub 7-delta/].  United States: N. p., 1987. 
        Web.

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                    Alp, E E, Soderholm, L, Shenoy, G K, Hinks, D G, Veal, B W, & Montano, P A. Valence determination in high T/sub c/ oxide superconductors by XANES (X-ray Absorption Near Edge Structure) and Moessbauer spectroscopy. [La/sub 2-x/(Sr,Eu)/sub x/CuO/sub 4/; (Y,Gd,Pr)Ba/sub 2/Cu/sub 3/O/sub 7-delta/].  United States.

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                    Alp, E E, Soderholm, L, Shenoy, G K, Hinks, D G, Veal, B W, and Montano, P A. 1987.  
        "Valence determination in high T/sub c/ oxide superconductors by XANES (X-ray Absorption Near Edge Structure) and Moessbauer spectroscopy. [La/sub 2-x/(Sr,Eu)/sub x/CuO/sub 4/; (Y,Gd,Pr)Ba/sub 2/Cu/sub 3/O/sub 7-delta/]".  United States.

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@article{osti_5848506,

  title        = {Valence determination in high T/sub c/ oxide superconductors by XANES (X-ray Absorption Near Edge Structure) and Moessbauer spectroscopy. [La/sub 2-x/(Sr,Eu)/sub x/CuO/sub 4/; (Y,Gd,Pr)Ba/sub 2/Cu/sub 3/O/sub 7-delta/]},

  author       = {Alp, E E and Soderholm, L and Shenoy, G K and Hinks, D G and Veal, B W and Montano, P A},

  abstractNote = {The question of valence of Cu and rare-earth atoms in the newly discovered oxide superconductors with high transition temperatures is crucial to the understanding of their electronic structure. X-Ray Absorption Near Edge Structure and Moessbauer Spectroscopy were used to measure the valence of Cu, Pr, Eu, and Gd in La/sub 2-x/(Sr,Eu)/sub x/CuO/sub 4/ and (Y,Gd,Pr)Ba/sub 2/Cu/sub 3/O/sub 7-delta/. Results are presented, and the Cu valence as a function of oxygen concentration is discussed. 18 refs., 6 figs.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/5848506},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Sep 01 00:00:00 EDT 1987},

  month        = {Tue Sep 01 00:00:00 EDT 1987}

}

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