Effect of uniaxial and biaxial crystal-field potential on magnetic properties of a mixed spin-1/2 and spin-1 Ising model on honeycomb lattice

TL;DR

This paper provides an exact analysis of how uniaxial and biaxial crystal-field anisotropies affect the magnetic properties of a mixed spin-1/2 and spin-1 Ising model on a honeycomb lattice, revealing insights into spin tunneling and thermodynamics.

Contribution

It introduces an exact solution for the model incorporating crystal-field anisotropies, highlighting their influence on magnetic behavior and spin tunneling phenomena.

Findings

Crystal-field anisotropies significantly alter magnetic properties.

Evidence of spin tunneling between |+1> and |-1> states.

Thermodynamic quantities are affected by anisotropies.

Abstract

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.