57 citations · 111 across the 8 of their papers we have counts for
8 papers
Plasmon-Plasmon Interaction in Nanoparticle Assemblies: Role of the Dipole-Quadrupole Coupling
Olivier Masset, Roland Bastardis, Francois Vernay
The synthesis of metallic nanoparticle assemblies is nowadays well-controlled, such that these systems offer the possibility of controlling light at a sub-wavelength scale, thanks,…
Low-frequency signature of magnetization nutation in nanomagnets
M. P. Adams, R. Bastardis, A. Michels +1
In this work, we show that surface anisotropy in nanomagnets induces a nutational motion of their magnetization at various frequencies, the lowest of which can be described by the…
Surface-induced reduction of the switching field in nanomagnets
R. Bastardis, H. Kachkachi
Magnetization reversal in a many-spin nanomagnet subjected to an rf magnetic field, on top of a DC magnetic field, is studied by numerically solving the system of coupled (damped)…
Magnetization nutation induced by surface effects in nanomagnets
Roland Bastardis, Francois Vernay, Hamid Kachkachi
We investigate the magnetization dynamics of ferromagnetic nanoparticles in the atomistic approach taking account of surface anisotropy and the spin misalignment it causes. We demo…
Ferromagnetic resonance of coupled shifted chains of nano-elements
Roland Bastardis, Jean-Louis Déjardin, François Vernay +1
We investigate the FMR characteristics of a magnetic dimer composed of two chains of iron nanoparticles coupled by dipolar interactions. The latter are treated beyond the point-dip…
Ab initio study of the CE magnetic phase in half-doped manganites: Purely magnetic versus double exchange description
Roland Bastardis, Coen de Graaf, Nathalie Guihery
The leading electronic interactions governing the local physics of the CE phase of half-doped manganites are extracted from correlated ab initio calculations performed on an embedd…
Microscopic origin of isotropic non-Heisenberg behavior in highly correlated systems
Roland Bastardis, Nathalie Guihery, Coen de Graaf
We have reanalyzed the microscopic origin of the isotropic deviations that are observed from the energy spacings predicted by the HDVV Hamiltonian. Usually, a biquadratic spin oper…
A surprising relation between double exchange and Heisenberg model spectra: Application to half-doped manganites
Roland Bastardis, Nathalie Guihery, Nicolas Suaud
The Zener polarons recently found in half-doped manganites are usually seen as mixed valence entities ruled by a double exchange Hamiltonian involving only correlated electrons of…