Magnetic properties of nanostructured hollow microspheres

In: Journal of Magnetism and Magnetic Materials, Jg. 310 (2007) ; Nr. 2, S. 2453-2455
Zeitschriftenaufsatz / Fach: Physik
Computer simulations are presented to explore the magnetic and magnetomechanical properties of hollow microspheres consisting of a self-supporting shell of iron-oxide nanoparticles which were recently synthesized in experiment. The magnetic properties of the microspheres are governed by the dipolar interactions between the nanoparticles, leading to a complex vortex ground state structure with the magnetic moments aligned parallel to the surface. In magnetic fields, considerable deformations are observed that withstand external applied pressures.