TY - JOUR AU - Yushchenko, O. V. AU - Badalyan, A. Yu. PY - 2018/10/06 Y2 - 2024/03/29 TI - Microscopic Description of Nonextensive Systems in the Framework of the Ising Model JF - Ukrainian Journal of Physics JA - Ukr. J. Phys. VL - 58 IS - 5 SE - General problems of theoretical physics DO - 10.15407/ujpe58.05.0497 UR - https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018319 SP - 497 AB - <p>To describe the behavior of nonextensive systems, the deformed Ising Hamiltonian is introduced by substituting the spin variable si by the deformed one sqi. In the framework of mean-field theory, the phase transition paramagnet–ferromagnet is investigated for the deformed partition function. The influence of the non-extensive parameter q on the free-energy density and the steady-state value of order parameter is studied in the Landau approximation.</p> ER -