CINECA IRIS Institutional Research Information System
IRIS è la soluzione IT che facilita la raccolta e la gestione dei dati relativi alle attività e ai prodotti della ricerca. Fornisce a ricercatori, amministratori e valutatori gli strumenti per monitorare i risultati della ricerca, aumentarne la visibilità e allocare in modo efficace le risorse disponibili.
EnglishElectron paramagnetic resonance (EPR) of exchange-coupled pairs of Cu2+ ions was observed in KTaO3:Cu, K1-xLixTaO3:Cu and K1-xLixTa1-yNbyO3:Cu single crystals. The spectra are typical of centres with S = 1 and tetragonal symmetry with the pair axis parallel to the [100], [010] or [001] directions. The angular and temperature dependences of the signals have been studied. The experimental results are explained in terms of a pair centre model, which consists of a chain of two equivalent copper ions and three oxygen vacancies. The two copper ions occupy neighbouring tantalum sites and. one of the oxygen vacancies lies between them, the chain running in the (100) direction. Ferromagnetic exchange coupling takes place between the copper ions, as confirmed by the thermal behaviour of the corresponding EPR spectra.
Scheda prodotto non validato
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo
| Titolo: | Electron paramagnetic resonance of copper centres in potassium tantalate single crystals | |
| Autori: | ||
| Data di pubblicazione: | 2002 | |
| Rivista: | ||
| Abstract: | Electron paramagnetic resonance (EPR) of exchange-coupled pairs of Cu2+ ions was observed in KTaO3:Cu, K1-xLixTaO3:Cu and K1-xLixTa1-yNbyO3:Cu single crystals. The spectra are typical of centres with S = 1 and tetragonal symmetry with the pair axis parallel to the [100], [010] or [001] directions. The angular and temperature dependences of the signals have been studied. The experimental results are explained in terms of a pair centre model, which consists of a chain of two equivalent copper ions and three oxygen vacancies. The two copper ions occupy neighbouring tantalum sites and. one of the oxygen vacancies lies between them, the chain running in the (100) direction. Ferromagnetic exchange coupling takes place between the copper ions, as confirmed by the thermal behaviour of the corresponding EPR spectra. | |
| Handle: | http://hdl.handle.net/11571/106597 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
File in questo prodotto:
http://hdl.handle.net/11571/106597
Copyright © 2022