Abstract
Experimental and theoretical investigations were carried out to determine the pressure dependence of the axial zero field splitting (ZFS) parameter (ZFSP) D of Ni2+ ions in NiSnCl6·6H2O. The aim was to establish the applicability of this system as a probe for pressure calibration in high-magnetic field and high-frequency EMR (HMF–EMR) measurements. The superposition model (SPM) analysis of the ZFS parameters was employed to establish the magnetostructural correlations between the ZFS parameters and structural data for a wide range of values of the structural parameters as well as temperature and pressure. Due to lack of pertinent data for NiSnCl6·6H2O, data for NiCl2·6H2O and Sr3PbNiO6 compounds, which exhibit the closest ligand environment to that in NiSnCl6·6H2O, were utilized. The results indicate feasibility of pressure calibration up to 6GPa by measuring the EMR transitions originating from Ni2+ ions in NiSnCl6·6H2O.
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