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UV-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...
PublicationsUV 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...
PublicationsInvestigation 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....
PublicationsStructure 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...
PublicationsWeak 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...
PublicationsComparative characterization of differently grown ZnO single crystals by positron annihilation and Hall effect
High-quality ZnO single crystals of dimensions 10 × 10 × 0.3 mm3, grown either using a pressurized melt or a hydrothermal growth approach, have been investigated in their as-received state and are compared...
PublicationsEPR study on magnetic Zn1-xMnxO
Diluted magnetic semiconductors (DMS), systems formed by replacing cations of the host semiconductor material with transition-metal ions, are developed for further use in spintronics. A good combination...
PublicationsElectrical and magnetic properties of RE-doped ZnO thin films (RE = Gd, Nd)
Due to the small magnetic moments observed for 3d transition metals in ZnO [M. Diaconu, H. Schmidt, H. Hochmuth, M. Lorenz, G. Benndorf, J. Lenzner, D. Spemann, A. Setzer, K.W. Nielsen, P. Esquinazi, M....
PublicationsDynamic Magneto-Optical Imaging of Domains in Grain-Oriented Electrical Steel
Magneto-optical imaging with magneto-optical indicator films (MOIF) is a versatile method to characterize magnetic field distributions especially for material development and quality control. Magnetic...
PublicationsDeep defects generated in n-conducting ZnO : TM thin films
The ferromagnetism in highly transparent and intrinsically n-type conducting zinc oxide doped with 3d transition metals (TM), is predicted to be defect mediated. We investigate the generation of deep defects...
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