Premium
Microscopic Mechanisms of Paramagnetic Probe—Lattice Interaction for the System RbCdF 3 :Cr 3+ near the Structural Phase Transition
Author(s) -
Chernitskii M. V.,
Nikiforov A. E.,
Krotkii A. I.
Publication year - 1988
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221450208
Subject(s) - electron paramagnetic resonance , phase transition , condensed matter physics , lattice (music) , spin transition , paramagnetism , chemistry , materials science , nuclear magnetic resonance , physics , acoustics
Microscopic mechanisms of the interaction of the Cr 3+ ion spin system with fields due to the lattice distortions in RbCdF 3 crystals are studied. These mechanisms determine changes in the EPR spectrum below 124 K after structural phase transition. The order parameter dependence of the spin‐Hamiltonian parameters both, for centres with local charge compensation and for non‐local charge compensated centres is obtained. The significance of crystal distortions caused by the second order uniform deformation is revealed. Such distortions change considerably the constants determining the interaction of the spin system with the order parameter. To obtain reliable information about the phase transition using an EPR method it is necessary to apply microscopic analysis. The obtained results are compared with experimental data.