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Substrate effect on the resistive switching in BiFeO3 thin films
BiFeO3 thin films have been deposited on Pt/sapphire and Pt/Ti/SiO2/Si substrates with pulsed laser deposition using the same growth conditions. Au was sputtered as the top electrode. The microscopic structure...
PublicationsIntense white photoluminescence emission of V-implanted zinc oxide thin films
Pulsed laser deposited ZnO films were implanted with vanadium ions using ion energies between 30 and 250 keV with different fluences yielding vanadium concentrations in the range between 0.8 and 5 at....
PublicationsHigh electron mobility of phosphorous-doped homoepitaxial ZnO thin films grown by pulsed-laser deposition
The transport properties of phosphorous-doped ZnO thin films, grown by pulsed-laser deposition on thermally pretreated hydrothermally grown ZnO single-crystal substrates, are reported. The ZnO:P thin films...
PublicationsEffect of the substrate on the insulator-metal transition of vanadium dioxide films
Single-phase vanadium dioxide films grown on (0001) sapphire and (001) silicon substrates show a very different insulator–metal electronic transition. A detailed description of the growth mechanisms...
PublicationsMagnetoresistance effects in Zn0.90Co0.10O films
Zn0.90Co0.10O films of different thicknesses (689, 408, 355 nm) doped with 0.5 at. % Al were prepared by pulsed laser deposition on a-plane sapphire substrates. At 290 K the resistivity increases drastically...
PublicationsCluster spin glass behavior in Bi(Fe0.95Co0.05)O-3
The static and time-dependent magnetic properties of Bi(Fe0.95Co0.05)O3 have been investigated by dc and ac magnetization measurements. Cluster spin glass has been confirmed to be the ground state due...
PublicationsRoom temperature transparent ferromagnetism in 200 keV Ni2+ ion implanted pulsed laser deposition grown ZnO/sapphire film
Intrinsic ferromagnetism at room temperature has been observed in ZnO/sapphire films by implantation of 200 keV Ni2+ ions with fluences 6×1015, 8×1015, 1×1016, and 2×1016 ionscm2. Crystalline phases...
PublicationsFerromagnetic transition metal implanted ZnO: A diluted magnetic semiconductor?
Recent theoretical works have predicted that some semiconductors (e.g. ZnO) doped with magnetic ions are diluted magnetic semiconductors (DMS). In DMS, magnetic ions substitute cation sites of the host...
PublicationsMagnetoresistance and anomalous Hall effect in magnetic ZnO films
Magnetotransport measurements were performed on n-type conducting Co-doped ZnO and Mn-doped ZnO films prepared by pulsed laser deposition on a-plane sapphire substrates, and positive magnetoresistance...
PublicationsDecisive role of oxygen vacancy in ferroelectric versus ferromagnetic Mn-doped BaTiO3 thin films
Single-phase perovskite 5 at. % Mn-doped and undoped polycrystalline BaTiO3 thin films have been grown under different oxygen partial pressures by pulsed laser deposition on platinum-coated sapphire substrates....
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