Room temperature permanent magnetism in thiol-capped Pd-rich nanoparticles

We report on the permanent magnetism exhibited by 1 nm sized thiol-capped palladium nanoparticles, up to temperatures above 300 K. The hysteresis loop does not change appreciably between 5 and 300 K. The local magnetic anisotropy constant was found to be stronger than 2 meV per Pd atom. The localized character of electrons and holes of the 4d residual band, revealed through the structureless plasmon resonance curve, suggests that the origin of the permanent magnetism is associated with localized magnetic moments.