Phase diagrams of spin ½ Ashkin–Teller model with Dzyaloshinskii–Moriya interaction

• Published in: Journal of magnetism and magnetic materials Vol. 394; pp. 27 - 31
• Main Authors: Dani, Ibtissam, Tahiri, Najim, Ez-Zahraouy, Hamid, Benyoussef, Abdelilah
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15-11-2015
• Subjects: Ashkin–Teller model; Dzyaloshinskii–Moriya interaction; Mean-field theory; Multicritical phase diagrams; Reentrant phenomena; Dzyaloshinskii–Moriya interaction; Mean-field theory; Ashkin–Teller model; Multicritical phase diagrams; Reentrant phenomena
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2015.06.029

Ten new phase diagrams, including reentrant phenomena are found in the spin-half Ashkin–Teller model with different isotropic Dzyaloshinskii–Moriya (DM) interaction. However, by varying the strength of the (DM) parameter and for fixed values of the spin interaction coefficient J2/J1, the multicritical behavior is studied as a function of four-spin interaction coefficient J4/J1. These new results are obtained using the mean field theory (MFT) on a hypercubic lattice.
•Phase diagrams of Ashkin–Teller Model with Dzyaloshinskii–Moriya interaction.•The model is focused on the effect of DM interaction on the phase diagrams.•Using mean field theory we have studied this model.•Fourteen new phase diagrams, including a novel multicritical topology.•The first and second transitions lines are observed in this model.