The fabrication of biocompatible composites, consisting of magnetite nanoparticles embedded into a matrix of meltable dextran ester is presented which can be softened under an induced alternating magnetic field and may allow in that way a magnetically controlled release application. This could be a suitable alternative for swellable hydrogel composites embedded with magnetic particles as remote controlled biomaterial. Furthermore a texturing of particles in the polymer matrix by a static magnetic field was investigated.