Porous Silicon/Metal Hybrid System With Ferro and Paramagnetic Behavior

Fabricated ferromagnetic hybrid systems consisting of a porous silicon (PS) matrix with incorporated metal nanostructures exhibit magnetic properties which can be distinguished in two ranges. A first one is related to magnetic fields below the saturation magnetization of the deposited metal and a second one to higher magnetic fields. Considering the low field region the samples show magnetic characteristics due to the metal-precipitations (geometry, distribution, kind of metal) tunable by the deposition parameters. At higher fields an additional novel non-saturating term is observed which is dependent on the temperature and differs in strength between Ni and Co. In the frame of this work this additional paramagnetic term is experimentally investigated.