Study of the influence of surface anisotropy and lattice structure on the behaviour of a small magnetic cluster

@article{Hernandez2003StudyOT,
  title={Study of the influence of surface anisotropy and lattice structure on the behaviour of a small magnetic cluster},
  author={L. Hern'andez and C. Pinettes},
  journal={Journal of Magnetism and Magnetic Materials},
  year={2003},
  volume={295},
  pages={82-94}
}
Abstract We have studied by Monte Carlo simulations the thermal behaviour of a small ( N = 13 particles) cluster described by a Heisenberg model, including nearest-neighbour ferromagnetic interactions and radial surface anisotropy, in an applied magnetic field. We have studied three different lattice structures: hexagonal close packed, face centered cubic and icosahedral. We show that the zero-field thermal behaviour depends not only on the value of the anisotropy constant but also on the… Expand
11 Citations
Effects of size and surface anisotropy on thermal magnetization and hysteresis in the magnetic clusters
Abstract.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.Expand
Effect of anisotropy on small magnetic clusters
The effect of dipolar interaction and local uniaxial anisotropy on the magnetic response of small spin clusters where spins are located on the vertices of icosahedron, cuboctahedron, tetrahedron andExpand
Effect of surface anisotropy on the magnetic properties of magnetite nanoparticles: A Heisenberg–Monte Carlo study
In this study, we analyze the effect of surface anisotropy on the magnetic properties of magnetite Fe3O4 nanoparticles on the basis of a core-shell model. Magnetization, magnetic susceptibility, andExpand
Influence of temperature on the systematics of magnetic moments of free Fe clusters
We investigate how temperature affects the dependence of the average magnetic moments ¯ μ of clusters on their size and how the magnetic moment profile of an individual cluster varies withExpand
Magnetizations of a nanoparticle described by the transverse Ising model
The characteristic influences of size S, exchange interaction and transverse field on the longitudinal and transverse magnetizations of a ferroelectric small particle described by the transverseExpand
Phase diagrams of a nanoparticle described by the transverse Ising model
The phase diagrams of a ferroelectric small particle described by the transverse Ising model (TIM) are investigated by the use of two theoretical frameworks, namely the standard mean-field theory andExpand
The magnetic properties of mixed one-dimensional ferrimagnetic spin chain with complex arrangement
Abstract Based on Monte Carlo (MC) simulation, the magnetization behavior of one-dimensional mixed ferrimagnetic spin chain with complex arrangement and single-ion anisotropy under external field areExpand
An effect of particle size on the behavior of ferromagnetic materials
Abstract The dependence of magnetic behavior of media upon the particle/grain size is studied here. A model is presented to describe the behavior of nanomagnetic materials as a function of particleExpand
Nanoparticle with a ferrimagnetic interlayer coupling in the presence of single-ion anisotropis
Abstract The magnetic properties of a nanoparticle described by the transverse Ising model with single-ion anisotropis, which consists of a concentric spin-3/2 core and a hexagonal ring spin-5/2Expand
An Exactly Solvable Spin-1 Model under External Magnetic Field
A two-fold Cayley tree with fully q-coordinated sites is constructed and the spin-1 Blume–Capel model in the presence of an external magnetic field is solved exactly. The relevant properties such asExpand
...
1
2
...

References

SHOWING 1-10 OF 71 REFERENCES
Magnetic properties of spherical fcc clusters with radial surface anisotropy.
  • Dimitrov, Wysin
  • Physics, Medicine
  • Physical review. B, Condensed matter
  • 1995
TLDR
The magnetic properties of spherical fcc clusters at zero temperature are studied using a numerical solution of the Landau—Lifshitz equations of motion with damping to find a specific dependence of the coercivity on the size of the clusters. Expand
Estimation of electronic and structural influence on the thermal magnetic properties of clusters.
TLDR
Using an effective Heisenberg model for clusters the spin-wave spectrum is calculated by direct diagonalization and very small effects are found on the thermal magnetic properties relative to those predicted for the simple nearest-neighbor Heisenburg model. Expand
Finite-size versus surface effects in nanoparticles
Abstract We study the finite-size and surface effects on the thermal and spatial behaviours of the magnetisation of a small magnetic particle. We consider two systems: (1) A box-shaped particle ofExpand
Hysteretic properties of a magnetic particle with strong surface anisotropy
We study the influence of surface anisotropy on the zero-temperature hysteretic properties of a small single-domain ferromagnetic particle, and investigate limiting cases where deviations from theExpand
Effective magnetization of rotating free ferromagnetic metal clusters
The deflection of free magnetic metal clusters in a Stern-Gerlach magnetic field is studied. In particular we investigate magnetic resonance effects resulting from lattice anisotropy and clusterExpand
Surface anisotropy in ferromagnetic nanoparticles
The effect of surfaceanisotropy on the magnetic ground state of a ferromagnetic nanoparticle is investigated using atomic Monte Carlo simulation for spheres of radius R=6a and R=15a, where a is theExpand
Surface contribution to the anisotropy of magnetic nanoparticles.
TLDR
The result is second order in the Néel surface anisotropy, scales with the particle's volume, and has cubic symmetry with preferred directions. Expand
Effects of surface anisotropy on hysteresis in fine magnetic particles.
  • Dimitrov, Wysin
  • Physics, Medicine
  • Physical review. B, Condensed matter
  • 1994
TLDR
It is shown that some features of magnetization reversal are associated with spins at the surface of fine particles as well as the bulk random axis and surface anisotropy. Expand
Spin configuration of Gd13 clusters.
TLDR
It is shown that for a range of interaction strengths the spins assume a canted configuration, which leads to lower net magnetization of the cluster, and accounts for the anomalous low moments of Gd{sub {ital n}} clusters which have been experimentally observed. Expand
Magnetization of Gd cluster: Anomalous thermal behavior
Abstract:Theoretical studies of the temperature (T) dependence of magnetization of Gd13 clusters have been carried out within a classical Heisenberg model using Monte-Carlo simulations. It is shownExpand
...
1
2
3
4
5
...