Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2004-02-10
Phys. Rev. B 70 (2004) 014404
Physics
Condensed Matter
Statistical Mechanics
16 pages, 7 figures, submitted to Phys. Rev. B
Scientific paper
10.1103/PhysRevB.70.014404
Magnetic properties of a mixed spin-1/2 and spin-1 Ising model on honeycomb lattice are exactly investigated within the framework of generalized star-triangle mapping transformation. The particular attention is focused on the effect of uniaxial and biaxial crystal-field anisotropies that basically influence the magnetic behaviour of the spin-1 atoms. Our results for the basic thermodynamic quantities, as well as the dynamical time-dependent autocorrelation function indicate the spin tunneling between the $| +1>$ and $| - 1>$ states in the magnetically ordered phase.
Jascur Michal
Strecka Jozef
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