Magnetic nanoparticles change their magnetic structure in a magnetic field

Nanowerk  July 27, 2020 Up to now, scientists assumed that magnetism in a nanoparticle is essentially limited to this core area. Using neutron scattering on cobalt ferrite nanoparticles an international team or researchers (France, Germany, Czech Republic) has shown that the applied magnetic field causes some of the previously disordered magnetic moments in the surface region to become aligned, and thus ordered in a way comparable to the magnetization in the core region. However, a residual area with differently aligned spins remains on the surface, which cannot be ordered by the applied magnetic field. Overall, the research showed that the […]