Magnetotransport in nanocrystalline SmB6 thin films

Ferromagnetism in nanocrystalline epitaxial Co:TiO2 thin films

Domain structure and magnetotransport in epitaxial colossal magnetoresistance thin films

Our studies of compressively strained La0.7Sr0.3MnO7 ~LSMO! thin films reveal the importance of domain structure and strain effects in the magnetization reversal and magnetotransport. Normal and grazing incidence x-ray diffraction indicate that the compressive strain on these LSMO thin films on ~100! LaAlO3 is not completely relaxed up to thicknesses on the order of 1000 Å. The effect of the co...

Thickness dependent magnetotransport in ultra-thin manganite films

To understand the near-interface magnetism in manganites, uniform, ultrathin films of La0.67Sr0.33MnO3 were grown epitaxially on single crystal (001) LaAlO3 and (110) NdGaO3 substrates. The temperature and magnetic field dependent film resistance is used to probe the film’s structural and magnetic properties. A surface and/or interface related dead-layer is inferred from the thickness dependent...

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 ...