Browsing School of Physics by Author "SHVETS, IGOR"
Now showing items 1-20 of 181
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An alternative fluorine precursor for the synthesis of SnO2:F by spray pyrolysis
FLEISCHER, KARSTEN; ARCA, ELISABETTA; SHVETS, IGOR (2012)An alternative, non-toxic precursor was employed for the synthesis of SnO2:F transparent conducting oxide. The performance of benzenesulfonyl fluoride (BSF) as F source for spray pyrolysis was investigated. Its decomposition ... -
Aluminium doped Zn1−xMgxO A transparent conducting oxide with tunable optical and electrical properties
FLEISCHER, KARSTEN; SMITH, CHRISTOPHER; SHVETS, IGOR; ARCA, ELISABETTA (2012)A ternary mixed oxide Zn1 xMgxO has been doped with aluminium to create a range of transparent conducting oxides with tunable refractive index as well as work function. Conductive material was synthesised up to a magnesium ... -
Analytical model of CeO2 Oxidation and Reduction
LUBBEN, OLAF; SHVETS, IGOR; MURPHY, BARRY (2013) -
Anisotropic transport behavior in ultrathin epitaxial Fe films on vicinal oxide substrates
SHVETS, IGOR; MCEVOY, CIARAN (2005)Step-induced anisotropy of electron transport in ultrathin Fe film was investigated. The Fe films (2 and 10 nm) were deposited on vicinal MgO (100) substrate using molecular-beam epitaxy. It is found that the films with a ... -
Anomalous anisotropic magnetoresistance in epitaxial Fe3O4 thin films on MgO (100)
SHVETS, IGOR (American Physical Society, 2008-12)Studies of the angular dependence of the anisotropic magnetoresistance (AMR) are reported for epitaxial films of magnetite (Fe3O4) grown on MgO(001) and also for single crystals of magnetite. The characteristic feature of ... -
Anomalous magnetization reversal due to proximity effect of antiphase boundaries
SHVETS, IGOR; WU, HAN-CHUN (2011)Here we report anomalous double switching hysteresis loop and high coercivity (~0.1 T) in Fe3O4(110) thin films. Our analytical model based on spin chains confined within small antiphase boundary domains (APBDs) suggests ... -
Anomalous strain relaxation behaviour of Fe3O4/MgO (100) heteroepitaxial system grown using molecular beam epitaxy
SHVETS, IGOR; ARORA, SUNIL (2006)Strain relaxation studies in epitaxial magnetite (Fe3O4) thin films grown on MgO (100) substrates using high-resolution x-ray diffraction and cross-sectional transmission electron microscopy reveal that the films remain ... -
Antiband instability on vicinal Si(111) under the condition of diffusion-limited sublimation
SHVETS, IGOR (2012)In this paper, we investigate the antiband instability on vicinal Si(111) surfaces with different angles of misorientation. It is known that prolonged direct current-annealing of Si(111) results in the formation of antibands; ... -
Antiferromagnetic interlayer exchange coupling between Fe3O4 layers across a nonmagnetic MgO dielectric layer
SHVETS, IGOR; WU, HAN-CHUN; ARORA, SUNIL (2008)We have investigated the interlayer exchange coupling between the epitaxial spinel Fe3O4 layers across an insulating nonmagnetic MgO spacer. The epitaxial structure used for these investigations was Fe3O4 (10?nm)/MgO ... -
Application of single crystalline tungsten for fabrication of high resolution STM probes with controlled structure
SHVETS, IGOR; LUBBEN, OLAF; CHAIKA, ALEXANDER (2011)The possibility to fabricate scanning tunneling microscopy (STM) probes with controlled electronic structure using single crystalline tungsten tips is discussed. High resolution power of oriented single crystalline probes ... -
Article Quantifying the Performance of P-Type Transparent Conducting Oxides by Experimental Methods
FLEISCHER, KARSTEN; NORTON, EMMA; MULLARKEY, DARAGH; CAFFREY, DAVID; SHVETS, IGOR (2017) -
Asymmetry effects in atomically resolved STM images of Cu (014)-O and W (100)-O surfaces measured with MnNi tips
SHVETS, IGOR; MURPHY, SHANE (2007)We report on scanning tunneling microscopy (STM) studies of the Cu(014)-O and W(100)-O surfaces using MnNi tips. The STM data demonstrate asymmetry effects in atomically resolved images of W(100)-O as well as a regular ... -
Atomic row doubling in the STM images of Cu(014)-O obtained with MnNi tips
SHVETS, IGOR; MURPHY, SHANE (2007)We report on scanning tunneling microscopy studies of the Cu(014)-O surface using MnNi tips. Remarkably, the results show a regular apparent doubling of surface atomic rows in the {110} direction. A qualitative explanation ... -
Atomic scale spin-dependent STM on magnetite using antiferromagnetic STM tips
SHVETS, IGOR; MURPHY, SHANE (2005)STM tips made from antiferromagnetic MnNi have been used to investigate the atomic structure of the (001) and (111) surfaces of Fe3O4. The clean (001) surface displays a (root 2 x root 2)R45 degrees superlattice, which is ... -
Atomically resolved spin-dependent tunneling on the oxygen-terminated Fe3O4(111)
SHVETS, IGOR; MURPHY, SHANE; MARIOTTO, GUIDO (2004)We employ spin-polarized STM to study the spin-dependent tunneling between a magnetite (111) sample and an antiferromagnetic tip through a vacuum barrier at room temperature. Atomic scale STM images show significant ... -
Atomically resolved STM imaging with a diamond tip: Simulation and experiment
MURPHY, BARRY; CHAIKA, ALEXANDER; SHVETS, IGOR (2014) -
Beyond the Heisenberg model: Anisotropic exchange interaction between a Cu-tetraazaporphyrin monolayer and Fe3O4(100)
SHVETS, IGOR (2013)The exchange coupling of a single spin localized at the central ion of Cu-tetraazaporphyrin on a magnetite(100) surface has been studied using x-ray magnetic circular dichroism (XMCD). Sum rule analysis of the XMCD spectra ... -
Bi-substitution-induced magnetic moment distribution in spinel BixCo2-xMnO4 multiferroic
SHVETS, IGOR (2009)We report the near-edge x-ray absorption spectroscopy (NEXAFS) at the Co/Mn L3,2 edge and oxygen K edge of the well-characterized Bi-substituted Co2MnO4 multiferroic samples. The evolution of peak features in NEXAFS spectra ... -
Bulk defects in graphite observed with a scanning tunnelling microscope
SHVETS, IGOR (Elsevier, 1998)Scanning tunnelling microscopy (STM) has been used to observe a misorientation of a graphite layer that is buried several layers below the surface. A nanoscale periodic pattern superimposed on the atomic graphite lattice ... -
Charge freezing and surface anisotropy on magnetite (100)
COEY, JOHN; SHVETS, IGOR (1993)Scanning tunneling microscope images of the (100) surface of slightly nonstoichiometric magnetite taken at room temperature show static arrays of pairs of Fe2+ ions with short?range order, and a charge fluctuation time ...