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

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

2004-07-28

arxiv.org/abs/cond-mat/0407726v2

Physica A 358 (2005) 393

Physics

Condensed Matter

Statistical Mechanics

20 pages, 6 figures

Scientific paper

10.1016/j.physa.2005.07.010

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

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