Year: 1995
Type: article
Abstract: EPR studies were performed on MgSiF 6 .6H 2 O single crystals using Mn 2+ paramagnetic probes substituted for Mg 2+ ions. The spin-Hamiltonian parameters (SHPs) are determined accurately for the different phases: the monoclinic phase below T c =301 K, the rhombohedral phase above T 0 =370 K and the intermediate phase between T c and T 0 . The sets of SHPs are interpreted in the light of structural changes between these phases. The EPR line features in the intermediate phase are analysed in the framework of a static and an order-disorder model. We interpret the EPR spectrum behaviours around T 0 -20 K as the occurrence of a crossover between static and dynamic disorder in the material.
Authors: A Kassiba, R Hrabanski, D Bonhomme, A Hader
Institution: Le Mans Université
Language: English
Subfield: Spectroscopy
Field: Chemistry
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1532922012