2024
DOI: 10.1088/1402-4896/ad8116
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Role of biquadratic exchange on thermodynamic quantities in anisotropic Heisenberg model

Nida Korkmaz,
Gülistan Mert

Abstract: The magnetic and thermodynamic properties of the spin-1 anisotropic Heisenberg system are studied within Oguchi approximation. The system contains both the bilinear and biquadratic exchange interactions between the nearest neighboring spins located on a centered honeycomb lattice. For the positive biquadratic exchange interaction parameters, the phase transition in the Heisenberg case is of both second and first order where there is a discontinuity in the thermodynamic properties at this transition temperature… Show more

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