Some of the most relevant finite-size and surface effects in the magnetic and
transport properties of magnetic fine particles and granular solids are
reviewed. The stability of the particle magnetization, superparamagnetic regime
and the magnetic relaxation are discussed. New phenomena appearing due to
interparticle interactions, such as the collective state and non-equilibrium
dynamics, are prese... hiện toàn bộ
Early experiments in magnonics were made using ferrite samples, largely due to
the intrinsically low magnetic (spin-wave) damping in these materials.
Historically, magnonic phenomena were studied on micrometre to millimetre length
scales. Today, the principal challenge in applied magnonics is to create
sub-micrometre devices using modern polycrystalline magnetic alloys. However,
until certain tech... hiện toàn bộ