Magnetic particle-loaded polymer brushes induced by external magnetic field: A Monte Carlo simulation

2010 ◽  
Vol 48 (17) ◽  
pp. 1873-1881 ◽  
Author(s):  
Yisheng ye ◽  
Zhengquan Pan ◽  
Linxi Zhang ◽  
Linli He ◽  
Agen Xia ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
External Magnetic Field ◽  
Polymer Brushes ◽  
Magnetic Particle

The Influnence of the Amplitude and Frequency of Sweeped Magnetic Field on the Exchange Bias and Coercivity for Ferromagnetic / Antiferromagnetic Films: Monte Carlo Simulation

2011 ◽  
Vol 694 ◽  
pp. 538-542
Author(s):  
Wen Ting Zheng ◽  
Li Qin Jiang ◽  
Zhi Gao Huang
Keyword(s):  
Magnetic Field ◽  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Relaxation Time ◽  
Monte Carlo Method ◽  
External Magnetic Field ◽  
Low Temperature ◽  
Exchange Bias

The influnence of the amplitude (H0) and frequency of sweeped magnetic field on the exchange bias He and coercivity Hc for ferromagnetic/ antiferromagnetic films has been simulated with Monte Carlo method. In a cycle, the sweeped frequency is inversely proportional to Monte Carlo steps (MCSs). It is observed that, for smaller MCSs, the values of He and the blocking tempreture Tb reduce evidently with increasing MCSs; for larger MCSs, the values of He and Tb decrease gently with increasing MCSs. It is also found the values of He and Tb decrease obviously with increasing values of H0 (HN0). However, on the contrary, the value of Hc increases with increasing values of H0 (HN0). At low temperature and little HN0, the asymmetric loop may appear, which is attributed to the competition between the relaxation time and the period of the external magnetic field. Moreover, the symmetry of the loops influences evidently the values of He and Hc.

Monte Carlo Simulation of Magnetic Skyrmions in Ferromagnetic Films

2020 ◽  
Vol 312 ◽  
pp. 256-260
Author(s):  
Alexander Perzhu ◽  
Egor Vasiliev ◽  
Dmitrii Kapitan ◽  
Roman Volotovskiy ◽  
Alexey Rybin ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
External Magnetic Field ◽  
Magnetic Films ◽  
Magnetic Vortex ◽  
Heisenberg Spin ◽  
Monte Carlo Simulation Technique ◽  
Magnetic Skyrmions ◽  
Moriya Interaction

Magnetic films, in which magnetic vortex textures - skyrmions appear because of competition between the direct Heisenberg exchange and the Dzyaloshinskii-Moriya interaction, were studied using the Monte-Carlo simulation technique. The conditions for the nucleation and stable existence of magnetic skyrmions in magnetic films in the frame of the classical Heisenberg model were considered in the paper. The process of nucleation of skyrmions with increasing of the external magnetic field was studied, various phases into which the Heisenberg spin system passes were recognized. A phase diagram was plotted: it shows the behavior of the system at the constant value of temperature depending on values of an external magnetic field and Dzyaloshinskii-Moriya interaction.

Phase diagrams and hysteresis behaviors of a ferrimagnetic mixed spins S = 1/2 and S = 1 Ising nanowire

2018 ◽  
Vol 32 (26) ◽  
pp. 1850289 ◽  
Author(s):  
A. Alrajhi ◽  
M. Madani ◽  
N. Hachem ◽  
M. El Bouziani
Keyword(s):  
Magnetic Field ◽  
Phase Diagram ◽  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Phase Transitions ◽  
External Magnetic Field ◽  
Size Effect ◽  
Hysteresis Loops ◽  
Mixed Spins ◽  
Mixed Spin

The ferrimagnetic mixed spin-1/2 and spin-1 cubic Ising nanowire is studied in the framework of the Monte Carlo simulation. The competition between the bilinear interaction and crystal field of spin-1 atoms as well as the nanowire size effect is highlighted. The corresponding phase diagram is discussed showing compensation points and critical second-order phase transitions. The effect of an external magnetic field and the hysteresis loops behavior are also carried out. Finally, we compare our results with other works in the literature.

Monte Carlo Modelling of Phase Transitions in Quasi-One-Dimensional Multiferoic

2016 ◽  
Vol 845 ◽  
pp. 158-161
Author(s):  
S.J. Lamekhov ◽  
Dmitry A. Kuzmin ◽  
Igor V. Bychkov ◽  
I.A. Maltsev ◽  
V.G. Shavrov
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Monte Carlo ◽  
Phase Transitions ◽  
Monte Carlo Method ◽  
External Magnetic Field ◽  
Periodic Potential ◽  
One Dimensional ◽  
Field Modelling ◽  
Energy Components

Behavior of quasi-one-dimensional multiferoic Ca3CoMnO6 in external magnetic field was investigated. Modelling by Monte Carlo method was performed to show influence of external magnetic field on appearance of polarization and temperature of phase transition in electric subsystem. Magnetization, polarization and energy components for magnetic and electric subsystems dependencies were achieved for different values of external magnetic field. Modelling showed that periodic potential in form of Frenkel-Kontorova makes influence on maximal values and temperature of phase transitions for magnetization and polarization.

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