Dynamic magnetic hysteresis loop behaviors of a mixed spin (2, 5/2) Ising model on two interpenetrating square lattices
Mustafa Keskín, Mehmet Ertaş
Abstract
Abstract We investigate dynamic magnetic hysteresis loop (DMHL) behaviors of a mixed spin (2, 5/2) Ising model on two interpenetrating square lattices under an oscillating magnetic field within the effective-field theory based on Glauber–type stochastic dynamics. We study the DMHL properties for various values of reduced temperatures (T/zJ), crystal-field interaction (D/zJ) and frequency ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>w</mml:mi> </mml:math> ) of the magnetic field. We also examine T/zJ, D/zJ and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>w</mml:mi> </mml:math> dependences of the coercive fields (CFs) and remanent magnetizations (RMs). We found that for very low and high values of T/zJ and D/zJ, the hysteresis loop area is narrower and thinner that correspond soft magnets that desirable for transformers and motor cores and AC applications. We observed that for high values of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>w</mml:mi> <mml:mo>,</mml:mo> </mml:math> the hysteresis loop areas are wide and big that corresponds hard magnets which can be useful for permanent magnets, magnetic recording, small motors and magnetic locks. We also found that the DMHLs, CFs and RMs behaviors are in quantitatively good agreement with some theoretical for Ising systems and experimental works for magnetic materials, such as cobalt films, Fe films and some magnetic nanomaterials.