Magnetic properties of a mixed spin-1/2 and spin-3/2 Ising model with an uniaxial and biaxial crystal-field potential

摘要

Magnetic properties of a mixed spin-1/2 and spin-3/2 Ising model on honeycomblattice are investigated within the framework of an exact star-triangle mappingtransformation. The particular attention is focused on the effect of uniaxialand biaxial crystal-field potentials that basically influence the magneticbehaviour of the spin-3/2 atoms. Our results for the basic thermodynamicquantities, as well as the dynamical time-dependent autocorrelation functionindicate the spin tunneling between the $| \pm \frac32>$ and $| \mp \frac12>$states in two different magnetically ordered phases OP$_1$ and OP$_2$,respectively.