6814 Suchergebnisse für: „“
Room-temperature cathodoluminescence of n-type ZnO thin films grown by pulsed laser deposition in N-2, N2O, and O-2 background gas
Epitaxial ZnO thin films were grown by pulsed laser deposition (PLD) in N2 or N2O or O2 background gas on MgO-buffered a-plane sapphire. The excitonic room-temperature cathodoluminescence (CL) intensity,...
PublikationenMagnetoresistance in pulsed laser deposited 3d transition metal doped ZnO films
ZnO films with different 3d transition metal doping (Ti, Co, Mn) were prepared by pulsed laser deposition. The occurrence of positive magnetoresistance (MR) was studied in dependence on temperature. Large...
PublikationenLow temperature photoluminescence and infrared dielectric functions of pulsed laser deposited ZnO thin films on silicon
C-axis oriented ZnO thin films were grown on silicon (100) and (111) substrates by pulsed laser deposition. Low temperature photoluminescence spectra show besides the peaks of free excitons, of defect...
PublikationenInfluence of vanadium concentration on the microstructure and magnetic properties of V-doped ZnO thin films
Vanadium doped ZnO thin films (Zn1−xVxO, where x=0.05 or x=0.13) were grown on c-cut sapphire substrates using pulsed laser deposition technique. Their structure and magnetic properties were examined...
PublikationenA comparison between ZnO films doped with 3d and 4f magnetic ions
We present electrical and magnetic properties of ZnO films doped with 3d (Mn) and 4f (Gd or Nd) magnetic ions grown on a-plane Al2O3 substrates. Both for films doped with 3d magnetic ions and for films...
PublikationenUV-VUV spectroscopic ellipsometry of ternary MgxZn1-xO (0 <= x <= 0.53) thin films
The ordinary optical dielectric functions of pulsed-laser-deposition grown wurtzite c-plane MgxZn1yxO (0FxF0.53) thin films have been determined by using spectroscopic ellipsometry in the photon energy...
PublikationenUV optical properties of ferromagnetic Mn-doped ZnO thin films grown by PLD
The incorporation of 3d transition metals into ZnO can produce ferromagnetism above room temperature. For Mn-doped ZnO films grown at low temperatures around 500 8C by pulsed laser deposition, the ferromagnetic...
PublikationenInvestigation of acceptor states in ZnO by junction DLTS
We have realized a p-type ZnO surface layer by N+ ion implantation of a high quality ZnO wafer and subsequent annealing. The conduction type of this surface layer was revealed by scanning capacitance microscopy....
PublikationenStructure and ferromagnetism of Mn+ ion-implanted ZnO thin films on sapphire
Slow Positron Implantation Spectroscopy (SPIS), based on the generation, implantation and subsequent annihilation of mono-energetic positrons in a sample, has been used to study depth dependent vacancy-type...
PublikationenWeak ferromagnetism in textured Zn1-x(TM)(x)O thin films
Room-temperature ferromagnetic Zn1−x(TM)xO semiconductor thin films have been grown by pulsed laser deposition (PLD) on c-plane sapphire substrates and the effect of the substitution of Zn2+ ions by...
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