Structural, magnetic and spectroscopic investigations of europium oxychloride, EuOCl

T. Aitasalo*, J. Hölsä, M. Lastusaari, J. Legendziewicz, L. Lehto, J. Lindén, M. Maryško

*Korresponderande författare för detta arbete

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

15 Citeringar (Scopus)

Sammanfattning

The reaction of the ammonium halides (NH4X, X- = F-, Cl-, Br-) with the rare earth (R) oxides (e.g. R2O3) is a convenient way to obtain the trihalides (RX3) or stoichiometrically pure oxyhalides (ROX). Problems may arise with rare earths which can be easily reduced by the ammonia produced during the reaction. In this study, the products of the reaction between Eu 2O3 and NH4Cl were investigated with the X-ray powder diffraction, Mössbauer and EPR spectroscopies and magnetic susceptibility measurements. The tetragonal crystal structure of EuOCl was refined with the Rietveld method. The Mössbauer and EPR spectra as well as the paramagnetic susceptibility measurements were analysed to detect the presence of divalent europium. The evolution of the paramagnetic susceptibility as a function of temperature was measured and compared to that calculated from previous spectroscopic measurements. Only the paramagnetic susceptibility measurements revealed beyond doubt the presence of divalent Eu2+ impurity.

OriginalspråkEngelska
Sidor (från-till)296-302
Antal sidor7
TidskriftJournal of Alloys and Compounds
Volym380
Utgåva1-2 SPEC. ISS.
DOI
StatusPublicerad - 20 okt 2004
MoE-publikationstypA1 Tidskriftsartikel-refererad

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