Nonequilibrium dynamical ferromagnetism of interacting single-molecule magnets

Liu, Gui-Bin; Liu, Bang-Gui
November 2009
Applied Physics Letters;11/2/2009, Vol. 95 Issue 18, p183110
Academic Journal
We propose a nonequilibrium Monte Carlo (MC) approach to explore nonequilibrium dynamical ferromagnetism of interacting single molecule magnets (SMMs). Both quantum spin tunneling and thermally activated spin reversal are implemented in the same MC simulation framework. Applied to a typical example, this simulation method satisfactorily reproduces experimental magnetization curves with experimental parameters. Our results show that both quantum and classical effects are essential to determine the hysteresis behaviors. This method is effective and reliable to gain deep insights into SMMs.


Related Articles

  • Hysteresis loop signatures of phase transitions in a mean-field model of disordered Ising magnet. Timonin, P. N. // JETP Letters;Aug2010, Vol. 91 Issue 11, p577 

    The multiplicity of long-lived states in frustrated disordered magnets makes the task to experimentally deter-mine which of them has the lowest free energy (and thus what thermodynamic phase the sample is in) seem rather hopeless. Nevertheless here we show in the framework of Landau-type...

  • Influence of dipolar interactions on hyperthermia properties of ferromagnetic particles. Serantes, D.; Baldomir, D.; Martinez-Boubeta, C.; Simeonidis, K.; Angelakeris, M.; Natividad, E.; Castro, M.; Mediano, A.; Chen, D.-X.; Sanchez, A.; Balcells, Ll.; Martínez, B. // Journal of Applied Physics;Oct2010, Vol. 108 Issue 7, p073918 

    We show both experimental evidences and Monte Carlo modeling of the effects of interparticle dipolar interactions on the hysteresis losses. Results indicate that an increase in the intensity of dipolar interactions produce a decrease in the magnetic susceptibility and hysteresis losses, thus...

  • Step-induced magnetic-hysteresis anisotropy in ferromagnetic thin films. Zhao, D.; Liu, Feng; Huber, D. L.; Lagally, M. G. // Journal of Applied Physics;3/1/2002, Vol. 91 Issue 5, p3150 

    We investigate the quasistatic magnetic hysteresis of ferromagnetic thin films grown on a vicinal substrate, using Monte Carlo simulations within a two-dimensional XY model. Intrinsic in-plane anisotropy is assigned to surface sites according to their local symmetry. The simulated hysteresis...

  • Magnetism of Nano-Graphene with Defects: A Monte Carlo Study. Masrour, R.; Bahmad, L.; Benyoussef, A.; Hamedoun, M.; Hlil, E. // Journal of Superconductivity & Novel Magnetism;Mar2013, Vol. 26 Issue 3, p679 

    The effect of the defects on magnetic properties of a bilayer Ising ferromagnetic antiferromagnetic model is studied by Monte Carlo simulations, for a nano-graphene lattice with spins that can take the values σ=3/2 and S=5/2. We consider two ferromagnetic and antiferromagnetic bilayers with...

  • A model of the magnetic properties of coupled ferromagnetic/antiferromagnetic bilayers. Choo, D; Chantrell, R. W.; Lamberton, R; Johnston, A; O’Grady, K // Journal of Applied Physics;5/1/2007, Vol. 101 Issue 9, p09E521 

    A granular level model which is capable of predicting the bulk magnetic properties of coupled ferromagnetic and antiferromagnetic layers is described. The model is used in an extensive investigation of the effect of the thermal instability of the antiferromagnetic layer as a function of the...

  • Monte Carlo simulation of ferroelectric domain structure and applied field response in two dimensions. Potter, B. G.; Tikare, V.; Tuttle, B. A. // Journal of Applied Physics;5/1/2000, Vol. 87 Issue 9, p4415 

    A two-dimensional, lattice-Monte Carlo approach, based upon the energy minimization of an ensemble of electric dipoles, was developed to simulate ferroelectric domain behavior. The model utilizes a Hamiltonian for the total energy based upon electrostatic terms involving dipole–dipole...

  • Effects of size and surface anisotropy on thermal magnetization and hysteresis in the magnetic clusters. Huang, Z.; Chen, Z.; Li, S.; Feng, Q.; Zhang, F.; Du, Y. // European Physical Journal B -- Condensed Matter;May2006, Vol. 51 Issue 1, p65 

    Based on Monte Carlo simulation, the spin configurations, thermal magnetization and hysteresis loops of the clusters coated by the surface shell with radial anisotropy are studied. Interestingly, a new multidomain containing a few of subdomains whose easy directions are along those of the...

  • Multicritical behavior in the antiferromagnetic Blume–Capel model. Wang, Yung-Li; Kimel, J. D. // Journal of Applied Physics;4/15/1991, Vol. 69 Issue 8, p6176 

    Discusses a study on the multicritical behavior of the simple cubic antiferromagnetic Blume-Capel model. Application of the Monte Carlo method in the study; Location of the fourth-order critical point; Analysis of the data of staggered susceptibility with finite-size scaling included.

  • Effect of interfacial coupling on the magnetic ordering in ferro-antiferromagnetic bilayers. Tsai, Shan-Ho; Landau, D. P.; Schulthess, Thomas C. // Journal of Applied Physics;5/15/2003, Vol. 93 Issue 10, p8612 

    Monte Carlo simulations have been used to study magnetic ordering in coupled anisotropic ferro/antiferromagnetic (FM/AFM) films of classical Heisenberg spins. We consider films with flat interfaces that are fully uncompensated as well as rough interfaces that are compensated on average. For both...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics