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Author Wu, X. J. ♦ Tatsuki, T. ♦ Adachi, S. ♦ Tamura, T. ♦ Tanabe, K.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ YTTRIUM OXIDES ♦ SYNTHESIS ♦ CRYSTAL STRUCTURE ♦ COPPER OXIDES ♦ CHEMICAL COMPOSITION ♦ MAGNETIC MATERIALS ♦ X-RAY SPECTROSCOPY ♦ X-RAY DIFFRACTION ♦ MONOCLINIC LATTICES ♦ LATTICE PARAMETERS ♦ VACANCIES ♦ ELECTRON DIFFRACTION ♦ GRAIN SIZE ♦ EXPERIMENTAL DATA
Abstract A nearly single-phase sample of the recently discovered new magnetic material with a nominal composition of Y:Cu = 1:1.8 is prepared by a high pressure synthesis technique. Energy dispersive X-ray (EDX) analysis confirms that the composition ratio of Y to Cu is quite close to 1:1.8. The crystal structure of this sample was determined by means of X-ray powder diffraction Rietveld refinement. According to the refinement results, this structure has a monoclinic symmetry with a space group of I2/a (or C2/x, No. 15) and the lattice parameters a = 5.690(5) {angstrom}, b = 9.580(9) {angstrom}, c = 5.609(5) {angstrom}, and {beta} = 92.470(6){degree}. It is found that about 10% Cu sites are vacancies in this phase. Electron diffraction analysis indicate that the Cu vacancies do not form any ordering arrangement.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-07-01
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 31
Issue Number 7


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