Eur. Phys. J. Appl. Phys.
Volume 68, Number 3, December 2014
|Number of page(s)||5|
|Section||Spintronics, Magnetism and Superconductivity|
|Published online||12 December 2014|
Studies of EPR parameters for Mn5+-doped Ca2(MO4)Cl (M = P, As, V) crystals from a two-mechanism model
Department of Physics, Civil Aviation Flight University of China, Guanghan
618307, P.R. China
2 Department of Material Science, Sichuan University, Chengdu 610064, P.R. China
a e-mail: email@example.com
Revised: 18 September 2014
Accepted: 3 October 2014
Published online: 12 December 2014
The EPR parameters (zero-field splitting D and g-factors g//, g⊥) of Mn5+-doped solid state laser materials Ca2(MO4)Cl (M = P, As, V) are calculated from the complete high-order perturbation formulas of EPR parameters based on the two-mechanism model for 3d2 ions in a approximately tetragonal tetrahedron. The model includes the contributions from both the crystal-field (CF) mechanism and the charge-transfer (CT) mechanism (the latter is neglected in crystal field theory). The calculated results suggest that the contribution to EPR parameters due to CT mechanism is important. So, in the cases of high valence state 3dn ions in crystals, the reasonable explanation of EPR parameters should take both CF and CT mechanisms into account.
© EDP Sciences, 2014
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