6533b835fe1ef96bd129f709
RESEARCH PRODUCT
Surface contribution to the anisotropy of magnetic nanoparticles.
Hamid KachkachiDmitry A. Garaninsubject
PhysicsCondensed Matter - Materials ScienceCondensed matter physicsStatistical Mechanics (cond-mat.stat-mech)General Physics and AstronomyOrder (ring theory)Materials Science (cond-mat.mtrl-sci)FOS: Physical sciencesMagnetocrystalline anisotropySymmetry (physics)Orientation (vector space)MagnetizationMagnetic anisotropyMagnetic nanoparticlesAnisotropyCondensed Matter - Statistical Mechanicsdescription
We calculate the contribution of the Neel surface anisotropy to the effective anisotropy of magnetic nanoparticles of spherical shape cut out of a simple cubic lattice. The effective anisotropy arises because deviations of atomic magnetizations from collinearity and thus the energy depends on the orientation of the global magnetization. The result is second order in the Neel surface anisotropy, scales with the particle volume and has cubic symmetry with preferred directions [+-1,+-1,+-1].
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-10-04 | Physical review letters |