Magnetic neutron scattering from spherical nanoparticles with Neel surface anisotropy: Atomistic simulations
arXiv:2205.07552 · doi:10.1107/S1600576722008949
Abstract
We consider a dilute ensemble of randomly-oriented noninteracting spherical nanomagnets and investigate its magnetization structure and ensuing neutron-scattering response by numerically solving the Landau-Lifshitz equation. Taking into account the isotropic exchange interaction, an external magnetic field, a uniaxial magnetic anisotropy for the particle core, and in particular the Neel surface anisotropy, we compute the magnetic small-angle neutron scattering cross section and pair-distance distribution function from the obtained equilibrium spin structures. The numerical results are compared to the well-known analytical expressions for uniformly magnetized particles and provide guidance to the experimentalist. Moreover, the effect of a particle-size distribution function is modeled.
References in corpus (23)
- Finite-Size and surface effects in maghemite nanoparticles: Monte Carlo simulations
- Surface contribution to the anisotropy of magnetic nanoparticles
- Hysteretic properties of a magnetic particle with strong surface anisotropy
- Magnetic nanoparticles: from the nanostructure to the physical properties
- Embracing defects and disorder in magnetic nanoparticles
- Using small-angle scattering to guide functional magnetic nanoparticle design
- Supraferromagnetic correlations in clusters of magnetic nanoflowers
- Microstructural-defect-induced Dzyaloshinskii-Moriya interaction
- Size-dependent spatial magnetization profile of manganese-zinc ferrite Mn0.2Zn0.2Fe2.6O4 nanoparticles
- Theory of magnetic small-angle neutron scattering of two-phase ferromagnets
- Boundary and finite-size effects in small magnetic systems
- Resolving complex spin textures in nanoparticles by magnetic neutron scattering
- Ordered arrays of magnetic nanowires investigated by polarized small-angle neutron scattering
- Effect of Dzyaloshinski-Moriya interaction on spin-polarized neutron scattering
- Three-Dimensional Chiral Magnetization Structures in FeGe Nanospheres
- Dipolar spin-misalignment correlations in inhomogeneous magnets: comparison between neutron scattering and micromagnetic approaches
- Magnetic structure of the promising candidate for three-dimensional artificial spin ice: small angle neutron diffraction and micromagnetic simulations
- Spin-wave theory for finite classical magnets and superparamagnetic relation
- Third-order effect in magnetic small-angle neutron scattering by a spatially inhomogeneous medium
- Magnetic neutron scattering by magnetic vortices in thin submicron-sized soft ferromagnetic cylinders
- Small-angle neutron scattering by spatially inhomogeneous ferromagnets with a nonzero average uniaxial anisotropy
- Magnetic neutron scattering from spherical nanoparticles with Neel surface anisotropy: Analytical treatment
- Comment on "Origin of Surface Canting within Nanoparticles"