Investigation of oscillation frequency and disorder induced dynamic phase transitions in a quenched-bond diluted Ising ferromagnet

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:329

Article

Vatansever, Erol^1,2  Akinci, Umit¹  Yuksel, Yusuf^1,2  Polat, Hamza¹ 

[1] Dokuz Eylul Univ, Dept Phys, TR-35160 Izmir, Turkey

[2] Dokuz Eylul Univ, Grad Sch Nat & Appl Sci, TR-35160 Izmir, Turkey

关键词: Dynamic phase transition;    Quenched bond diluted kinetic Ising model;    Effective-field theory;   

DOI  :  10.1016/j.jmmm.2012.10.024

来源: Elsevier

【 摘 要 】

Frequency evolutions of hysteresis loop area and hysteresis tools such as remanence and coercivity of a kinetic Ising model in the presence of quenched bond dilution are investigated in detail. The kinetic equation describing the time dependence of the magnetization is derived by means of effective-field theory with single-site correlations. It is found that the frequency dispersions of hysteresis loop area, remanence and coercivity strongly depend on the quenched bond randomness, as well as applied field amplitude and oscillation frequency. In addition, the shape of the hysteresis curves for a wide variety of Hamiltonian parameters is studied and some interesting behaviors are found. Finally, a comparison of our observations with those of the recently published studies is represented and it is shown that there exists a qualitatively good agreement. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.

【 授权许可】

Free