Impurity-impurity pair correlation function and paramagnetic-to-ferromagnetic transition in the random Ising model

• Дата: 2007
• Автори: Ivaneyko, D., Berche, B., Holovatch, Yu., Ilnytskyi, Ja.
• Формат: Стаття
• Мова: English
• Опубліковано: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2007
• Назва видання: Вопросы атомной науки и техники
• Теми: Phase transformations in condensed matter
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/111598
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Impurity-impurity pair correlation function and paramagnetic-to-ferromagnetic transition in the random Ising model / D. Ivaneyko, B. Berche, Yu. Holovatch, Ja. Ilnytskyi // Вопросы атомной науки и техники. — 2007. — № 3. — С. 372-375. — Бібліогр.: 12 назв. — англ.

In this Monte Carlo study we concentrated on the influence of non-magnetic impurities arranged as the lines with random orientation on paramagnetic-to-ferromagnetic phase transition in the 3D Ising model. Special emphasize is given to the long-distance decay of the impurity-impurity pair correlation function. It is shown that for the lattice sizes considered (L=10-96) and for the two different impurity distributions (purely random and mutually avoiding lines) the function is governed by the power law of 1/ra with an universal exponent a≈2. This result supports our findings about the numerical values of the critical exponents governing magnetic phase transition in the 3D Ising model with long-range-correlated disorder.