OXYGEN-CATION INTERACTIONS IN SUPERCONDUCTING CUPRATES AND RELATED-COMPOUNDS

Authors
FINKELSTEIN LD GALAKHOV VR FEDORENKO VV ELOKHINA LV SAMOKHVALOV AA KURMAEV EZ BUTORIN SM NORDGREN J SLOBODIN BV TETERIN YA SOSULNIKOV MI
Citation
Ld. Finkelstein et al., OXYGEN-CATION INTERACTIONS IN SUPERCONDUCTING CUPRATES AND RELATED-COMPOUNDS, Solid state communications, 90(12), 1994, pp. 769-772
Citations number
9
Categorie Soggetti
Physics, Condensed Matter
Journal title
Solid state communications → ACNP
ISSN journal
00381098
Volume
90
Issue
12
Year of publication
1994
Pages
769 - 772
Database
ISI
SICI code
0038-1098(1994)90:12<769:OIISCA>2.0.ZU;2-Y
Abstract
It is shown that the OKalpha X-ray emission spectra of high-T(c) super conductors may be presented as superpositions of the contributions fro m O-Cu, O-M3+ and O-M2+ bonds, in the ratio determined by the formula content of the compound. It is established by X-ray emission spectrosc opy that O-Cu and O-M3+ bonds are practically identical to those in th e initial oxides, whereas the O-M2+ contribution is shifted by 0.5-1.0 eV towards higher energies, that indicates the increase of the covale nt contribution in the O-M2+ interaction. The correlation is found bet ween n(M2+)/N(M(total)) and T(c).