XPS Study of "infinite Chain" Ca_{2}CuO_{3} and Ca_{0.5}Sr_{0.5}CuO_{2} Compounds

• Authors: I. Jacyna-Onyszkiewicz , Yu. Poltoracky
• Languages of publication: EN

Abstracts

EN

Al K_{α} excited photoelectron spectra (X-ray photoelectron spectroscopy) of the O 1s, Cu 2p, Ca 2p, Sr 3d core levels were measured for "infinite chain" Ca_{2}CuO_{3} and Ca_{0.5}Sr_{0.5}CuO_{2} compounds. The analysis indicates that for Ca_{2}CuO_{3} the surface electronic structure is strongly influenced by a humid atmosphere. The surface layer is formed predominantly by copper hydroxide. The minor features of Cu 2p and O 1s are characteristic of the bulk bonding states. The valences of the Cu, Ca, and Sr atoms are close to 2+. The core electron binding energies (≈ 934 eV peak) are due to the 2p_{3/2}3d^{10}L^{1} configuration of Cu(II) ions in the square planar coordination for both samples.

Keywords

EN

79.60.-i; 74.72.-h; 74.72.Jt

Discipline

• 74.72.-h: Cuprate superconductors
• 79.60.-i: Photoemission and photoelectron spectra(for photoelectron spectroscopy, see 87.64.ks in biological physics; 82.80.Pv in chemical analysis)

• Journal: Acta Physica Polonica A
• Year: 2000
• Volume: 97
• Issue: 3
• Pages: 603-606

Dates

published

2000-03

Contributors

author

I. Jacyna-Onyszkiewicz

• Institute of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

Yu. Poltoracky

• NMO "Monocrystalreactiv", Lenin 60, 310077 Kharkov, Ukraine

Identifiers

DOI

10.12693/APhysPolA.97.603