Fizika Nizkikh Temperatur: Volume 44, Number 11 (November 2018), p. 1491-1500 ( to contents , go back )
EPR spectra of D4h symmetry four-nuclear molecular complex
О.О. Galkin Donetsk Institute of Physics and Engineering, 46 Nauki Ave., Kyiv 03680, Ukraine
Received April 27, 2018, published online September 26, 2018
EPR spectra of spin s=½ four-nuclear single molecular mag-net of D4h symmetry were studied for the nearest neighbors isotropic ferromagnetic exchange and Dzyaloshinskii-Moria interaction as well as axial and local azimuthal anisotropy. Dependence of EPR spectra on Hamiltonian parameters of a spin tetramer is described. Influence of spin mixing on the splitting of spectral lines was considered for inter-multiplet and intra-multiplet transitions. This study resulted in obtaining simple relations between resonance frequencies of particular spectral lines and parameters of local Hamiltonian.
Key words: spin tetramer, multiplet, anisotropy, soin-spin interaction.