Spectroscopic studies of Ti3+ ions speciation inside MgAl2O4 spinels

Pierre Lombard 1, * Bruno Boizot 1 Nadège Ollier 1 Anis Jouini Akira Yoshikawa 2
* Corresponding author
1 LSI - Laboratoire des Solides Irradiés
2 IMRAM - Institute for Multidisciplinary Research on Advanced Materials
Abstract : An electron paramagnetic resonance (EPR) investigation on Ti-doped MgAl2O4 spinels has been made in order to study the Ti3+ sites. The study we present here concerns the angular dependencies of the Ti3+ EPR lines and the variations of the EPR spectra due to a modificatino of the TiO2 content or of the chemical composition from MgAl2O4 to MgAl4O7 and MgAl6O10. In all the studied samples except one, we observe the presence of both Mn2+ and Ti3+ ions. No correlation was observed between Ti3+ amount and TiO2 content; The titanium ions are located in three different sites: the octahdral B site of the spinel structure; the tetrahedral A site and a last site which remains unclear. On the contrary, the major part of the Mn2+ ions is assumed to be in the tetrahedral A site of the spinel structure and a minor part in the octahedral B site. Our work demonstrates the overall interest of EPR spectroscopy in the study of the paramagnetic optically active ions inside optical materials.
Document type :
Journal articles
Complete list of metadatas
https://hal-polytechnique.archives-ouvertes.fr/hal-00488410
Contributor : Pierre Lombard <>
Submitted on : Tuesday, June 1, 2010 - 10:25:48 PM
Last modification on : Wednesday, March 27, 2019 - 4:26:01 PM

Links full text

openaccess

Identifiers

Collections

CNRS | X | X-LSI | PARISTECH | CEA | DSM-IRAMIS | CEA-DRF | X-DEP-PHYS

Citation

Pierre Lombard, Bruno Boizot, Nadège Ollier, Anis Jouini, Akira Yoshikawa. Spectroscopic studies of Ti3+ ions speciation inside MgAl2O4 spinels. Journal of Crystal Growth, Elsevier, 2008, 311, pp.899-903. ⟨10.1016/j.jcrysgro.2008.09.131⟩. ⟨hal-00488410⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

306

Contact

Informations

CCSD