TY - JOUR JF - jsci JO - VL - 14 IS - 1 PY - 2014 Y1 - 2014/4/01 TI - Thermodynamic behavior of the spin-1/2 Ising chain with added Dzyaloshinsky-Moriya interaction TT - رفتار ترمودینامیکی زنجیرۀ آیزینگ اسپین-2/1 با برهم‌کنش ژایالوشینسکی- موریا N2 -   The spin-1/2 Ising chain in presence of a magnetic field and the Dzyaloshinskii-Moriya interaction is considered. First, using the rotation operator the model is transformed to the anisotropic spin-1/2 XXZ model in presence of a longitudinal magnetic field and then, using the fermionization technique and mean field approximation, the diagonalized Hamiltonian is obtained. The thermodynamic behavior of the specific heat is studied. It is found that the maximum value of the specific heat shows dual behavior. Specially, in the region of fields less than quantum critical field, it decreases by increasing field but behaves inversely in the region of the magnetic fields more than the quantum critical field. In addition, the magnetization process is studied and it is shown that the Dzyaloshinskii-Moriya interaction influences the magnetization process.  SP - 67 EP - 76 AU - Feiznejad, Zahra AU - Mahdavifar, Saeed AD - Faculty member KW - mean field approximation KW - specific heat KW - magnetization process UR - http://jsci.khu.ac.ir/article-1-1771-en.html ER -