Two-Magnon Relaxation Processes in Nanocrystalline Thin Magnetic Films

Ferromagnetism in nanocrystalline epitaxial Co:TiO2 thin films

Nanocrystalline silicon thin films on PEN substrates

We study the structural and electrical properties of intrinsic layers growth close to the transition between amorphous silicon (a-Si:H) and nanocrystalline silicon (nc-Si:H) deposited on glass and PEN without intentional heating. These samples showed different behaviour in Raman shift and XRD spectra when compared with that of samples deposited at 200oC. Electrical properties of these films als...

Nanocrystalline structure and hardness of thin films

WaSiaN films were deposited by reactive sputtering in a N2+Ar atmosphere from a W target incrusted with different number of Si pieces. The coatings present different crystallographic structures from the crystalline a-W and W2N to amorphous phase. Crystalline films have very low grain sizes from 15 down to 3 nm. For WaSi films there is a good correlation between the increase of the hardness and ...

Hard Magnetic Thin Films

Hard magnetic films have a broad application area ranging from magnetic recording media to microelectromagnetic devices. A challenge for recording media is the 60% annual increase in areal density, which requires ever smaller magnetic dots. However, for a given magnetic anisotropy the reduction of dot size is limited, since below a critical magnetic volume the magnetisation becomes thermally un...

Relaxation effects in HTc-Superconducting Thin Films

Mechanical relaxation experiments have been widely applied to bulk high temperature (HT,) superconducting materials. In contrast to that only few results obtained on HT, superconducting thin films were reported. None dealt with stress driven phenomena due to the high background damping from the substrate materials used. In applied magnetic fields, however, a host reed technique can be used and ...