Superparamagnetism
= Superparamagnetism
= Superparamagnetic
{synonym}
A regime in which particle-scale magnetic moments reverse thermally on the observation timescale, giving little quasistatic remanence despite internally ordered single-domain particles. Being single-domain is not sufficient: anisotropy barriers and measurement time determine whether reversal is rapid. A finite-frequency drive can still produce relaxation losses.