EDP Sciences Journals List
Home Document
Subscriber Authentication Point
Issue Eur. Phys. J. Appl. Phys.
Volume 24, Number 3, December 2003
Page(s) 209 - 213
Section Plasmas, Discharges and Processes
DOI 10.1051/epjap:2003065
Published online 16 September 2003

Eur. Phys. J. Appl. Phys. 24, 209-213 (2003)
DOI: 10.1051/epjap:2003065

Crystal-field analysis of the Cr $\mathsf{^{4+}}$ absorption and excitation spectrum in LiGaO $\mathsf{_2}$ oxide crystal

S. Kammoun and M. Kamoun

Groupe de Physique Théorique, Département de Physique, Faculté des Sciences de Sfax, BP 802, 3018 Sfax, Tunisia

Souha.Kammoun@fss.rnu.tn

(Received: 1st February 2003 / Received in final form: 17 April 2003 / Accepted: 20 June 2003 Published online: 16 September 2003)

Abstract
The absorption and excitation spectra of the tetrahedrally coordinated Cr 4+ ions doped in LiGaO 2 oxide crystal are measured by Kück and Hartung at room temperature. Using the experimentally determined data from these spectra, a theoretical calculation for the crystal-field levels of Cr 4+:LiGaO 2 was performed by Kück and Hartung, based on the angular overlap model theory (AOM). The calculation reveals an important discrepancy between the theoretical and the experimental energies. A detailed crystal-field analysis of electronic energy levels of Cr 4+ doped in LiGaO 2 oxide crystal based on the Racah theory is proposed in this work. The observed crystalline-field splitting of the Cr 4+ terms was accounted for using a C 1 symmetric Hamiltonian. In turn, reliable crystal-field and Racah parameters have been obtained. This theoretical analysis confirms the observed crystalline-field splittings of the 3F and 3P terms of the Cr 4+ ion doped in the oxide crystal LiGaO 2.

PACS
71.70.Ch - Crystal and ligand fields.
72.80.Ga - Transition-metal compounds.
76.30.Fc - Iron group (3d) ions and impurities (Ti-Cu).

© EDP Sciences 2003


What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.
  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.