Abstract
Due to their rather simple crystal structure, the infinite-layer (IL) compounds have attracted much interest as a favorable system for the study of mechanisms of the electron or hole doping of the CuO2 planes in the high-Tc superconductors. Crystalline electric field (CEF) investigation of high-Tc superconductors provides direct evidence of the charge transfer process, since the rare-earth ion serves as a local probe for the effective charge associated with the superconducting CuO2 planes. Inelastic neutron scattering has been employed to search for CEF transitions in the Sr0.87Nd0.13CuO2 compound produced by a high-pressure technique. The observed energy spectra at T = 10 K exhibit two well-defined inelastic lines at 14.9, 19.5 meV and very weak scattering of magnetic origin around 41 and 80 meV associated with the Nd3+ ions in the IL phase. Based on the present results as well as on a well-established extrapolation scheme possible CEF energy spectra for the IL phase are discussed.
Original language | English |
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Pages (from-to) | 794-796 |
Number of pages | 3 |
Journal | Physica B: Physics of Condensed Matter |
Volume | 234-236 |
DOIs | |
State | Published - Jun 2 1997 |
Externally published | Yes |
Funding
This research was supported by the Russian Foundation for Basic Researches (Grant No. 96-02-16699-a) and the Russian Scientific Council on High-To Problems (Project No. 93001). We are grateful to the ILL, Grenoble and JINR, Dubna for providing infrastructure facilities.
Keywords
- Crystal fields
- High-T superconductors
- Perovskite compounds