1. Continuum of compensation points in the mixed spin Ising ferrimagnet with four-spin interaction and next-nearest neighbor coupling.
- Author
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Azhari, M., Benayad, N., and Mouhib, M.
- Subjects
- *
FERRIMAGNETIC materials , *ISING model , *PHASE diagrams , *SPIN-spin interactions , *PHASE transitions , *APPROXIMATION theory - Abstract
We investigate the magnetic properties of the mixed spin-1/2 and spin-1 Ising ferrimagnetic system with four-spin interactionJ4and next-nearest neighbor (NNN) couplingJ′. We perform exact ground-state calculations and use the finite cluster approximation, based on a single cluster theory, to derive the state equations for the two-dimensional square lattice. The main attention has been paid to the study of the phase diagram for both the transition and compensation temperatures. We find a number of characteristic behaviors. The model with only NNNs induces one compensation point while the four-spin interaction does not. The investigation of the model with both interactions shows a number of characteristic behaviors. In particular, the presence of the four-spin interaction, according toJ4andJ′, may lead to one, two or possibly a continuum of compensation points. This phenomenon may have important applications in technology such as thermomagnetic writing and erasing at the compensation point. [ABSTRACT FROM PUBLISHER]
- Published
- 2017
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