The step effect of hysteresis loop in FM/AFM mixed magnetic system

Wang, J; Liu, Y; Xie, Zheng; M, Q

doi:10.1088/1742-6596/29/1/012

Cited by 8 publications

(4 citation statements)

References 14 publications

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“…This suggests a lower temperature tends to make the step effect. These results have the same tendency with other works [18,19,21,31]. Figure 7a and b shows the effect of the single-ion anisotropies D A and D B on the coercivity H c of the system at different temperatures, respectively.…”

Section: Model and Monte Carlo Simulationsupporting

confidence: 84%

“…They found that anistropy produces irregularties in the low-temperature hysteresis curve. It has been pointed out that the step effect of ferromagnetic and antiferromagnetic mixed films depends on the anisotropy, magnetic dipolar interaction and temperature [20,21]. Besides, the most remarkable characteristic found in low-dimensional magnetic systems applied to the external magnetic field is to show 2S þ 1 magnetic plateaus at low temperature when the magnetic field increases from zero to its saturation value h s [22][23][24].…”

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confidence: 99%

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Monte Carlo simulation of step effect on molecular‐based magnets

Wang

Jiang

2011

Physica Status Solidi (b)

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Monte Carlo simulation has been used in detail to study the step effect of the hysteresis loop for a ferrimagnetic mixed spin-2 and spin-5/2 Ising model on a honeycomb lattice. The results indicate that the hysteresis loops exhibit an obvious step effect and various shapes for different single-ion anisotropies and exchange couplings at very low temperature. Under a longitudinal magnetic field (h > 0 or h < 0), we have obtained 2S þ 1 magnetic plateaus for different single-ion anisotropies at low temperature. The existence of triple and double hysteresis loop patterns has been found in the system. It is shown that the sublattice anisotropy and the interlayer exchange coupling strongly affect the coercivity of the system. The influence of the interlayer exchange couplings on the total magnetization, susceptibility, internal energy and specific heat with temperature are numerically examined in the absence of the longitudinal field.

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Section: Model and Monte Carlo Simulationsupporting

confidence: 84%

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confidence: 99%

Monte Carlo simulation of step effect on molecular‐based magnets

Wang

Jiang

2011

Physica Status Solidi (b)

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“…Simulation results shows, that the hysteresis loop can be largely modified by breaking geometric symmetry of square arrays, and coercivity in general is found to increase with array disorder. Numerical experiments using statistical analysis and Monte Carlo simulation were made in [3]. Authors investigated the nature of step effect in the hysteresis loop with ±J Ising model and Heisenberg model respectively.…”

Section: Introductionmentioning

confidence: 99%

Collective Smart Вehaviour of Magnetic Nanoparticles at Simulation of Hysteresis Phenomena in Artificial Ordered Array

Peretyatko

Nefedev

2014

AMM

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The high performance algorithm for supercomputer simulation of magnetic nanoparticles arrays was elaborated and implemented in parallel c++ code. Our program package allows a modeling of magnetic hysteresis phenomenon in the system of the magnetic spherical monoaxial one-domain dipole nanoparticles fixed in node of a square lattice with the period of 10-8 m in frame of Stoner-Wolfforth approach. During numerical experiments dependences of a type of curves of a hysteresis on number of particles and values of a critical field are investigated. It was showed, that the area of loops has proportional dependence from individual critical field of nanoparticles.

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“…The multi-layered systems have also been studied by using many theoretical approaches such as: The Monte Carlo (MC) simulations have been used in studying the magnetic ordering [13] and phase transitions [14] in coupled anisotropic FM/AFM films of classical Heisenberg spins, in simulating an N N N ¥ ¥ ( 10 16 20) N = , , Ising superlattice consisting of alternating layers of a FM and an AFM with different exchange interaction strengths in the AFM layer [15], in analyzing the nature of step effect in hysteresis loop with ±J Ising model and Heisenberg model [16] and in studying the magnetization reversal mechanism in ferromagnetic thin films on FeF 2 [17]. The exchange bias of the FM/AFM bilayer having L1 2 -type ordered structure has been investigated within the framework of Heisenberg model [18].…”

Section: Introductionmentioning

confidence: 99%

The FM/AFM bilayer Bethe lattice with FM or AFM interlayer interactions

Albayrak

2008

Physica Status Solidi (b)

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The bilayer Bethe lattice with the Ising spins of the top layer having only ferromagnetic (FM) interactions and the spins of the bottom one having only antiferromagnetic (AFM) interactions were allowed to interact via the interlayer interaction either FM or AFM type. The problem was analyzed by using the exact recursion relations in a pairwise approach for given coordination numbers q = 3, 4 and 6 with equal external magnetic fields acting on the layers. The phase diagrams of the model were obtained on different planes for given system parameters by studying the ground state (GS) phase diagrams and the thermal variations of the order parameters and the response functions, i.e. the susceptibility and the specific heat, in detail. The model with five distinct GS configurations presents only the second‐order phase transition lines, i.e. the lines of the Néel temperatures TN. Two TN's were obtained for q = 6 in the transition regions from the AFM phases to the FM phases at low temperatures, as a result the TN lines show reentrant behavior for q = 6. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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The step effect of hysteresis loop in FM/AFM mixed magnetic system

Cited by 8 publications

References 14 publications

Monte Carlo simulation of step effect on molecular‐based magnets

Monte Carlo simulation of step effect on molecular‐based magnets

Collective Smart Вehaviour of Magnetic Nanoparticles at Simulation of Hysteresis Phenomena in Artificial Ordered Array

The FM/AFM bilayer Bethe lattice with FM or AFM interlayer interactions

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