Conversions of the Second-Rank Zero Field Splitting Parameters Measured Assuming the Fictitious Spin S'=1 to those for the Effective Spin S̃=2
M. Kozaneckia and C. Rudowicza,b
aFaculty of Chemistry (FC), Adam Mickiewicz University (AMU), Umultowska 89B, 61-614 Poznań, Poland
bVisiting Professor: FC, AMU; On leave of absence from: Institute of Physics, West Pomeranian University of Technology Szczecin, al. Piastów 17, 70-310 Szczecin, Poland
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We investigate feasibility of comparison between the zero field splitting parameters obtained experimentally based on the spin Hamiltonian with the fictitious spin S'=1 and those with the effective spin S̃=2. The former zero field splitting parameters have recently been measured for Fe2+ ions in forsterite Mg2SiO4, whereas the latter zero field splitting parameters are available in literature, e.g. for Fe2+ and Cr2+ (S̃=2) ions. It turns out that no unique direct comparison is feasible and hence appropriate conversion: relations need to be derived. Methodology for such conversions is outlined. Various combinations of the possible energy level schemes for the spin S̃=2 and S'=1 are briefly described. Illustrative preliminary results concerning appropriate conversions of the second-rank zero field splitting parameters measured by high-frequency EMR for Fe2+ in natural and synthetic forsterite are presented. Detailed results and full analysis will be given elsewhere.

DOI: 10.12693/APhysPolA.132.11
PACS numbers: 71.70.Ch, 75.10.Dg, 76.30.-v, 76.30.Fc