Magnetostatic interactions between magnetic nanotubes

Magnetic interactions between nanoparticles

We present a short overview of the influence of inter-particle interactions on the properties of magnetic nanoparticles. Strong magnetic dipole interactions between ferromagnetic or ferrimagnetic particles, that would be superparamagnetic if isolated, can result in a collective state of nanoparticles. This collective state has many similarities to spin-glasses. In samples of aggregated magnetic...

Casimir Interactions Between Scatterers in Carbon Nanotubes

CASIMIR INTERACTIONS BETWEEN SCATTERERS IN CARBON NANOTUBES Dina Zhabinskaya Eugene J. Mele, advisor In this thesis we calculate interactions between localized scatterers in metallic carbon nanotubes. Backscattering of electrons between localized scatterers mediates long range forces between them. These interactions are mapped to Casimir forces mediated by one-dimensional massless fermions and ...

Magnetostatic interactions on a square lattice

The metastable zero field magnetic states of elongated Permalloy islands on square lattices of different geometries are investigated by means of magnetic force microscopy and numerical calculations. Keeping the island shape L /w=10 fixed while varying the interparticle distances a, it is demonstrated that the relative frequencies of observed magnetic configuration at remanence strongly depend o...

Spherical tensor approach to multipole expansions. II. Magnetostatic interactions

The magnetic field due to a given current distribution, the interaction energy of a current distribution with an arbitrary external magnetic field, and the magnetostatic interaction energy between two current distributions are decomposed into multipolar components using spherical harmonic expansions. Diamagnetic interactions and the spin contributions to the multipole expansions are also discus...

Theory of Magnetostatic Coupling in Thin-Film Rectangular Magnetic Elements