Browsing School of Physics by Author "SHVETS, IGOR"
Now showing items 21-40 of 181
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Charge ordering on the surface of Fe3O4(001)
SHVETS, IGOR; MURPHY, SHANE; MARIOTTO, GUIDO (2002)We have studied the (001) surface of a Fe3O4 single crystal using scanning tunneling microscopy (STM), low-energy electron diffraction (LEED), and Auger electron spectroscopy. A clean surface was obtained by a combination ... -
Composite Fe<inf>3</inf>O<inf>4</inf>-W(100) probes for scanning tunneling microscopy
SHVETS, IGOR (2017) -
Concept of a nanowire array magnetoresistance device
SHVETS, IGOR; MURPHY, SHANE; ARORA, SUNIL (2008)We describe a concept of the magnetoresistive medium comprising of a planar array of intermingled nanowires with pinned and unpinned magnetic moments. We propose a bottom up method of forming the medium and demonstrate the ... -
Conducting mechanism in the epitaxial p-type transparent conducting oxide Cr2O3:Mg
SHVETS, IGOR; FARRELL, LEO; FLEISCHER, KARSTEN (2015)Epitaxial p -type transparent conducting oxide (TCO) Cr 2 O 3 :Mg was grown by electron-beam evaporation in a molecular beam epitaxy system on c -plane sapphire. The influence of Mg dopants and the oxygen partial ... -
Continuous wafer-scale graphene on cubic-SiC(001
SHVETS, IGOR; CHAIKA, ALEXANDER (2013)The atomic and electronic structure of graphene synthesized on commercially available cubic-SiC(001)/Si(001) wafers have been studied by low energy electron microscopy (LEEM), scanning tunneling microscopy (STM), low energy ... -
Controlled in situ growth of tunable plasmonic self-assembled nanoparticle arrays
SHVETS, IGOR; MCGILP, JOHN; FLEISCHER, KARSTEN; FOX, DANIEL (2012)Self-assembled silver nanoparticle (NP) arrays were produced by deposition at glancing angles on transparent stepped Al2O3 templates. The evolution of the plasmonic resonances has been monitored using reflection anisotropy ... -
Critical field behavior and antiband instability under controlled surface electromigration on Si(111)
SHVETS, IGOR; USOV, VICTOR; O'COILEAIN, CORMAC (2011)In this study we investigate step bunching and antiband surface instabilities on Si(111). We experimentally study the effects of a controlled electromigration field on the onset of antibands. We analyze the initial stage ... -
Crystallographic orientation analyses of magnetite thin films using electron backscatter diffraction (EBSD)
SHVETS, IGOR (2006)The crystallographic orientation of magnetite (Fe3O4) thin films was measured using electron backscatter diffraction (EBSD). Misorientation boundaries appear in maps of angular misorientation data. The distribution of ... -
Decoupling the refractive index from the electrical properties of transparent conducting oxides via periodic superlattices
FLEISCHER, KARSTEN; CAFFREY, DAVID; NORTON, EMMA; Ó COILEÁIN, CORMAC; SMITH, CHRISTOPHER; FARRELL, LEO; SHVETS, IGOR (2016) -
Developments in surface magneto-optical Kerr effect setup for ultrahigh vacuum analysis of magnetic ultrathin films
SHVETS, IGOR; USOV, VICTOR; MURPHY, SHANE (2005)We describe a surface magneto-optical Kerr effect (SMOKE) setup designed to study the magnetic properties of ultrathin films in ultrahigh vacuum (UHV). As in earlier systems, a crossed-poles electromagnet is used, which ... -
Disclinations in C60 molecular layers on WO2/ W(110) surfaces
SHVETS, IGOR (2014)A scanning tunneling microscopy study of a planar close-packed C 60 hexagonal molecular layer on a WO 2 / W(110) substrate reveals the existence of C 60 domains exhibiting two preferred orientations at an angle with ... -
Domain wall configuration and magneto-transport properties in dual spin-valve with nanoconstriction
SHVETS, IGOR (2012)We investigated the effect of external field on magneto-transport properties of synthetic antiferromagnet dual spin-valve with nanoconstriction with focus on domain wall (DW) configuration and magnetization reversal process. ... -
Dynamic behavior of a piezowalker, inertial and frictional configurations
MARIOTTO, GUIDO; SHVETS, IGOR (American Institute of Physics, 1999)We have examined two configurations of a piezowalker, the inertial and the frictional one, both of which are capable of moving samples with submicrometer steps over a distance of some millimeters. We demonstrated that, ... -
Effect of Catalyst Diameter on Vapour-Liquid-Solid Growth of GaAs Nanowires
O'DOWD, BRENDAN; SHVETS, IGOR (2014)GaAs nanowires were grown on (111)B GaAs substrates using the vapour-liquid-solid mechanism. The Au/Pt nanodots used to catalyse wire growth were defined lithographically and had varying diameter and separation. An in-depth ... -
Effect of Chemical Precursors On the Optical and Electrical Properties of p‐Type Transparent Conducting Cr2O3:(Mg,N)
FLEISCHER, KARSTEN; ARCA, ELISABETTA; SHVETS, IGOR (2013)Cr2O3:(Mg,N) has been reported as a p-type transparent conducting oxide. In this contribution the effect of each precursor used for the deposition by spray-pyrolysis, will be explored and their role in determining the ... -
The effect of deposition power on the electrical properties of Al-doped zinc oxide thin films
SHVETS, IGOR; WU, HAN-CHUN (2010)We investigated the effect on the electronic properties of aluminum (Al)-zinc oxide (ZnO) films by modulating the radio frequency sputtering power. Our experimental results show that increasing the sputtering power increases ... -
Electrically driven phase transition inmagnetite nanostructurers
SHVETS, IGOR; LEE, SUNGBAE; FURSINA, ALEXANDRA; MAYO, JOHN T; CAFER, T. YUVUZ; COLVIN, VICKI L; SOFIN, RGS; NATELSON, DOUGLAS (NATURE PUBLISHING GROUP, 2008-02)Magnetite (Fe3O4), an archetypal transition-metal oxide, has been used for thousands of years, from lodestones in primitive compasses(1) to a candidate material for magnetoelectronic devices(2). In 1939, Verwey(3) found ... -
Enhancement of the magnetization saturation in magnetite (100) epitaxial films by thermo-chemical treatment
SHVETS, IGOR (2004)The effect of thermo-chemical treatment on the ease of saturation in a magnetic field of epitaxial magnetite (100) thin films grown on MgO (100) substrates was investigated. It was found that the films maintained a fully ... -
Epitaxial growth and magnetic properties of Fe nanowedge islands on Mo(110)
SHVETS, IGOR; MURPHY, SHANE; USOV, VICTOR (2005)Fe films with a nominal thickness greater than or equal to 2 Angstrom grown on Mo(1 10) at 500 less than or equal to Tless than or equal to 750 K self-assemble into nanowedge islands supported on a pseudomorphic Fe wetting ... -
Epitaxial growth of ultrathin Cr films on Mo (110) at elevated temperature
SHVETS, IGOR; MURPHY, SHANE (2006)The principal details of Cr film growth on Mo 110 at elevated temperature are described. Cr films form nanostripes by the step-flow growth mechanism for film coverages up to 3 monolayers. In contrast to the Fe/Mo 110 ...