Premium
X‐ray emission studies on the (La 1 − x Ba x ) 2 CuO 4 ± y system
Author(s) -
Acharya B. S.,
Muralidhar J.
Publication year - 1990
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.1300190305
Subject(s) - valency , coprecipitation , copper , diffusion , emission spectrum , analytical chemistry (journal) , materials science , phase (matter) , superconductivity , mixing (physics) , solid state , spectral line , chemistry , physics , condensed matter physics , inorganic chemistry , thermodynamics , metallurgy , astronomy , philosophy , linguistics , chromatography , organic chemistry , quantum mechanics
X‐ray emission spectroscopy was used to establish the valency of Cu in the superconducting (La 1‐ x Ba x ) 2 CuO 4±y (LBCO) system. Samples were prepared by both solid‐state diffusion and coprecipitation methods. It was observed that diffusion is faster and mixing is more intimate in the coprecipitated sample. A definite shift in the Cu K emission was also observed in samples such as CuO, La 2 CuO 4 and LBCO. It was observed that the valency of copper in the LBCO system is equal to or greater than 2. Further, Ba has been found to play a major role in the emission process. The La emission spectra remained the same for all the samples studied. SEM and XRD studies indicated the presence of a two‐phase structure of the compound.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom