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Sveinn Ólafsson - Vísindamaður

Sveinn Ólafsson

–

Verkfræði- og náttúruvísindasvið

Sveinn Ólafsson

Vísindamaður

Vísindamaður

Aðsetur
VR-3 / V03-202
Sími
5254693
Tölvupóstur
sveinol [hjá] hi.is

Starfseining
Eðlisvísindastofnun, Eðlisfræðistofa
Vefsíða
http://uni.hi.is/sveinol

ORCID vefsíða
https://orcid.org/0000-0002-3104-1142
Rannsóknagátt – Sveinn Ólafsson

Útgefið efni

2024

Nature of spontaneous signal and detection of radiation emitted from hydrogen Rydberg matterAIP Advances
Experimental apparatus for condensed excited hydrogen researchJournal of Instrumentation

2023

Temperature Dependence of the Hyperfine Magnetic Field at Fe Sites in Ba-Doped BiFeO₃ Thin Films Studied by Emission Mössbauer SpectroscopyCrystals

2022

Unusual charge states and lattice sites of Fe in Al_xGa_1−xN:MnNew Journal of Physics
Anisotropy of the Electric Field Gradient in Two-Dimensional α-MoO₃ Investigated by⁵⁷ Mn(⁵⁷ Fe) Emission Mössbauer SpectroscopyCrystals
Operando quantification of ammonia produced from computationally-derived transition metal nitride electro-catalystsJournal of Catalysis
Compositional Dependence of Epitaxial L1₀-Mn_xGa Magnetic Properties as Probed by ⁵⁷Mn/Fe and ¹¹⁹In/Sn Emission Mössbauer SpectroscopyPhysica Status Solidi (B) Basic Research
Charge and spin state of dilute Fe in NaCl and LiFPhysical Review B
Magnetic Structure and Strain State in Fe/V Superlattices Studied by ⁵⁷Fe⁺ Emission and Conversion Electron Mössbauer SpectroscopyCrystals

2021

Annealing studies combined with low temperature emission Mössbauer spectroscopy of short-lived parent isotopesReview of Scientific Instruments
Laser-induced annihilationHigh Energy Density Physics

2020

Experimental and Theoretical Study of Electronic and Hyperfine Properties of Hydrogenated Anatase (TiO₂)Journal of Physical Chemistry C
Mn₃GaC inverse perovskite thin films by magnetron sputtering from elemental targetsMaterials Research Express
Local increase of the Curie temperature in Mn/Fe implanted Y₃Fe₅O₁₂ (YIG)Applied Radiation and Isotopes
Metal-insulator transition in crystalline V₂O₃ thin films probed at atomic-scale using emission Mössbauer spectroscopyThin Solid Films

2019

Decay of muons generated by laser-induced processes in ultra-dense hydrogen H(0)Heliyon
⁵⁷ Fe Mössbauer study of epitaxial TiN thin film grown on MgO (1 0 0) by magnetron sputteringApplied Surface Science

2017

Vacancy defect-induced d0 ferromagnetism in undoped ZnO nanostructuresProgress in Materials Science
Atomic-scale study of the amorphous-to-crystalline phase transition mechanism in GeTe thin filmsScientific Reports
Charge states and lattice sites of dilute implanted Sn in ZnOJournal of Physics Condensed Matter

2016

Charged particle energy spectra from laser-induced processesInternational Journal of Hydrogen Energy
Emission Mössbauer spectroscopy study of fluence dependence of paramagnetic relaxation in Mn/Fe implanted ZnOHyperfine Interactions
Epitaxial and textured TiN thin films grown on MgO(1 0 0) by reactive HiPIMSJournal of Physics D: Applied Physics
⁵⁷Fe emission Mössbauer spectroscopy following dilute implantation of ⁵⁷Mn into In ₂O₃Hyperfine Interactions
Lattice sites, charge states and spin-lattice relaxation of Fe ions in ⁵⁷Mn⁺ implanted GaN and AlNJournal of Magnetism and Magnetic Materials
⁵⁷ Fe Emission Mössbauer Study on Gd₃Ga₅ O₁₂ implanted with dilute ⁵⁷MnHyperfine Interactions
Protection of Si photocathode using TiO₂ deposited by high power impulse magnetron sputtering for H₂ evolution in alkaline mediaSolar Energy Materials and Solar Cells
Sensitivity of ⁵⁷Fe emission Mössbauer spectroscopy to Ar and C induced defects in ZnOHyperfine Interactions

2015

Synthesis and characterization of magnetic (Cr0.5Mn0.5)(2)GaC thin filmsJournal of Materials Science
Method to control deposition rate instabilities - High power impulse magnetron sputtering deposition of TiO₂Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Spontaneous ejection of high-energy particles from ultra-dense deuterium D(0)International Journal of Hydrogen Energy
Muon detection studied by pulse-height energy analysisReview of Scientific Instruments
Observation of a periodic runaway in the reactive Ar/O₂ high power impulse magnetron sputtering dischargeAIP Advances
Damage annealing in low temperature Fe/Mn implanted ZnOHyperfine Interactions
Synthesis and characterization of magnetic (Cr_0.5Mn_0.5)₂GaC thin filmsJournal of Materials Science
Atomic-scale magnetic properties of truly 3d-diluted ZnOAdvanced Electronic Materials

2014

Synthesis and characterization of arc deposited magnetic (Cr,Mn)₂AlC MAX phase filmsPhysica Status Solidi - Rapid Research Letters
Formation and nitridation of InGa composite droplets on Si(1 1 1)Applied Surface Science
Structural and magnetic properties of (Cr1-xMnx)(5)Al-8 solid solution and structural relation to hexagonal nanolaminatesJournal of Materials Science
Structural and magnetic properties of (Cr_1-x Mn _x )₅Al₈ solid solution and structural relation to hexagonal nanolaminatesJournal of Materials Science
Interstitial Fe in MgOJournal of Applied Physics
Synthesis and characterization of arc deposited magnetic (Cr,Mn)(2)AlC MAX phase filmsPhysica Status Solidi-Rapid Research Letters
Defect annealing in Mn/Fe-implanted TiO₂ (rutile)Journal of Physics D: Applied Physics
Characterization of Fe states in dilute ⁵⁷Mn implanted SnO₂ filmHyperfine Interactions
Proximity effects on H absorption in ultrathin v layersPhysical Review B - Condensed Matter and Materials Physics
Thermal transitions in nano-patterned XY-magnetsApplied Physics Letters

2013

Stability of the Fe³⁺ state in ZnOHyperfine Interactions
Determining surface coverage of ultra-thin gold films from X-ray reflectivity measurementsThin Solid Films
The properties of TiN ultra-thin films grown on SiO₂ substrate by reactive high power impulse magnetron sputtering under various growth anglesThin Solid Films
Epitaxial (100)-oriented Mo/V superlattice grown on MgO(100) by dcMS and HiPIMSThin Solid Films
Ultra-thin gold films on transparent polymersNanophotonics
Possible cage motion of interstitial Fe in α-Al₂O₃Hyperfine Interactions
Magnetic self-organized atomic laminate from first principles and thin film synthesisPhysical Review Letters
Ultra-thin poly-crystalline TiN films grown by HiPIMS on MgO(100) - In-situ resistance study of the initial stage of growthThin Solid Films
Photoemission and low energy electron microscopy study on the formation and nitridation of indium droplets on Si (111)7 × 7 surfacesThin Solid Films
Study of spatial homogeneity and nitridation of an Al nanopattern template with spectroscopic photoemission and low energy electron microscopyApplied Surface Science
Rutile TiO₂ thin films grown by reactive high power impulse magnetron sputteringThin Solid Films

2012

Growth of TiO ₂ thin films on Si(001) and SiO ₂ by reactive high power impulse magnetron sputtering
Lattice locations and properties of Fe in Co/Fe co-implanted ZnOApplied Physics Letters
Current-voltage-time characteristics of the reactive Ar/O ₂ high power impulse magnetron sputtering dischargeJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
⁵⁷Fe Mössbauer studies on ⁵⁷Mn* implanted InP and InAsNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Comparing resonant photon tunneling via cavity modes and Tamm plasmon polariton modes in metal-coated Bragg mirrorsOptics Letters
Spin-lattice relaxations of paramagnetic Fe ³⁺ in ZnOPhysica Scripta
Nucleation and resistivity of ultrathin TiN films grown by high-power impulse magnetron sputteringIEEE Electron Device Letters
Mössbauer study of ¹¹⁹Sn in ¹¹⁹In ^* implanted 3C-SiCHyperfine Interactions
Fe charge state adjustment in ZnO upon ion implantationJournal of Physics Condensed Matter
A micro-spectroscopy study on the influence of chemical residues from nanofabrication on the nitridation chemistry of Al nanopatternsApplied Surface Science
Comparison of TiN thin films grown on SiO ₂ by reactive dc magnetron sputtering and high power impulse magnetron sputtering

2011

Growth and in-situ electrical characterization of ultrathin epitaxial TiN films on MgOThin Solid Films
Morphology of TiN thin films grown on SiO₂ by reactive high power impulse magnetron sputteringThin Solid Films
The effect of hard nitridation on Al₂O₃ using a radio frequency operated plasma cellThin Solid Films
Current-voltage-time characteristics of the reactive Ar/N2 high power impulse magnetron sputtering dischargeJournal of Applied Physics
Room temperature deposition of self-assembled Al nanoclusters on stepped sapphire (0001) surface and subsequent nitridationThin Solid Films
Current-voltage-time characteristics of the reactive Ar/N-2 high power impulse magnetron sputtering dischargeJournal of Applied Physics
Current-voltage-time characteristics of the reactive Ar/N₂ high power impulse magnetron sputtering dischargeJournal of Applied Physics

2010

Mössbauer study of ⁵⁷Fe in GaAs and GaP following ⁵⁷Mn⁺ implantationHyperfine Interactions
Growth and structural properties of Mg:C thin films prepared by magnetron sputteringThin Solid Films
Morphology of TiN thin films grown on MgO(001) by reactive dc magnetron sputteringJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
High-resolution X-ray photoemission spectroscopy study of AlN nano-columns grown by nitridation of Al nano-squares on Si(111) substrates with ammoniaThin Solid Films
Mössbauer spectroscopy of ⁵⁷Fe in α-Al₂O₃ following implantation of ⁵⁷Mn^*Hyperfine Interactions
ErratumThin Solid Films
The 23rd nordic semiconductor meetingPhysica Scripta T
Observation of spin-lattice relaxations of dilute Fe³⁺ in MgO by Mössbauer spectroscopyHyperfine Interactions
Paramagnetism in Mn/Fe implanted ZnOApplied Physics Letters
Magnetism in iron implanted oxidesHyperfine Interactions

2009

Isothermal defect annealing in semiconductors investigated by time-delayed Mössbauer spectroscopyHyperfine Interactions
Investigation on the role of indium in the removal of metallic gallium from soft and hard sputtered GaN (0001) surfacesThin Solid Films
In-situ electrical characterization of ultrathin TiN films grown by reactive dc magnetron sputtering on SiO₂Thin Solid Films
Mössbauer study of Fe in GaAs following ⁵⁷Mn ^∈+∈ implantationHyperfine Interactions
Electrical and structural properties of ultrathin polycrystalline and epitaxial TiN films grown by reactive dc magnetron sputtering
Temperature and dose dependence of defect complex formation with ion implanted Mn/Fe in ZnOPhysica B: Condensed Matter

2008

Cell based ultra high vacuum scanning probe microscope with an external scanning unit having gas or liquid processing capabilitiesJournal of Physics: Conference Series
Electrical resistivity and morphology of ultra thin pt films grown by dc magnetron sputtering on SiO₂Journal of Physics: Conference Series
Characterisation of high-temperature annealing effects on α - Ai ²O³(0001) substratesJournal of Physics: Conference Series
Growth, coalescence, and electrical resistivity of thin Pt films grown by dc magnetron sputtering on SiO ₂Applied Surface Science

2007

Influence of initial surface reconstruction on nitridation of Al ₂ O₃ (0001) using low pressure ammoniaJournal of Applied Physics
A magnetron sputtering system for the preparation of patterned thin films and in situ thin film electrical resistance measurementsReview of Scientific Instruments
Hydrogen uptake in Mg:C thin filmsJournal of Alloys and Compounds
Resistivity changes in Cr/V(0 0 1) superlattices during hydrogen absorptionJournal of Alloys and Compounds

2006

In situ resistivity measurements during growth of ultra-thin Cr_0.7Mo_0.3Thin Solid Films
A modular scanning tunneling microscope with an interchangeable elastic closed cell and external actuatorsApplied Surface Science
An externally cooled beetle type scanning tunneling microscope for imaging in cryogenic liquidsApplied Surface Science
Influence of MgO nano-crystals on the thermodynamics, hydrogen uptake and kinetics in Mg filmsThin Solid Films

2005

Thermodynamics of hydrogen uptake in Mg films studied by resistance measurementsJournal of Alloys and Compounds

2004

Preparation and characterization of magnetron sputtered, ultra-thin Cr _0.63Mo_0.37 films on MgOJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films

2003

Ræktun þunnra hálfleiðandi húðaRAUST - Tímarit um raunvísindi og stærðfræði
Influence of biaxial strain on thermodynamical properties of hydrogen in (001) oriented Mo/V superlatticesJournal of Alloys and Compounds
Hydrogen induced lattice expansion in 8/4 u.c. Mo/V superlatticeJournal of Alloys and Compounds

2002

Information policy disputes in IcelandInternational Information and Library Review
Growth and characterization of Na_0.5K_0.5NbO₃ thin films on polycrystalline Pt₈₀Ir₂₀ substratesJournal of Materials Research
Hydrogen interactions in ultrathin two-dimensional vanadium layersJournal of Magnetism and Magnetic Materials

2001

Vetni í MoV yfirgrindum
Atómmyndataka með smugsjá
Electrical and optical properties of CN_x(0≤x≤0.25) films deposited by reactive magnetron sputteringJournal of Applied Physics

2000

Growth of SrTiO₃ thin films on LaAlO₃(001) substrates; the influence of growth temperature on composition, orientation, and surface morphologyThin Solid Films
Electrostatic powder impact deposition (EPID) of Ge on Si and Cu substrates, microstructure and morphology studyJournal of Physics D: Applied Physics

1999

Vetni í þunnum málmhúðum
Growth and characterization of epitaxial films of tungsten-doped vanadium oxides on sapphire (110) by reactive magnetron sputteringJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Spætun og ræktun með segulspætu
Low temperature growth of SrTiO₃ thin films on glass fiber laminate substratesFerroelectrics

1998

Growth and field dependent dielectric properties of epitaxial Na_0.5K_0.5NbO₃ thin filmsApplied Physics Letters

1997

The orientation dependence of the hydrogen distribution within Mo/V (110) and (001) multilayered artificial superlatticesJournal of Physics Condensed Matter

1996

Synthesis of yttriumtrihydride films for ex-situ measurementsJournal of Alloys and Compounds

1995

Thermodynamic properties of hydrogen in quasi-two-dimensional vanadium latticesJournal of Physics: Condensed Matter
Charge transfer at interfaces in MoxV1-x/V superlatticesPhysical Review B

1994

On the near surface yield of the ¹H(¹⁵N,αγ)¹²C nuclear reaction and initial charge state equilibrationNuclear Inst. and Methods in Physics Research, B

1993

Hydrogen Uptake in Mo/V Multi Layered Single-Crystal Superlattices – the Role of Charge Transfer At InterfacesZeitschrift fur Physikalische Chemie
Hydride Formation in Mg/Ni-Sandwiches Studied By Hydrogen Profiling and Volumetric MeasurementsZeitschrift fur Physikalische Chemie
Hydrogen uptake of Mo/V superlatticesJournal of Magnetism and Magnetic Materials

1990

Oxygen concentration gradients in Y-Ba-Cu-OJournal of the Less-Common Metals

1989

Mælitækni og tölvuvinnsla

Sérsvið:

Röntgengreining

Tilraunaeðlisfræði:

Þéttefniseðlisfræði og kjarneðlifræði hennar

Ræktun og greining þunnra húða

Eðlisfræði vetnis í málmum

Sjálfbær nýting orku

Ræktun hálfleiðara

Yfirborðseðlisfræði XPS

Synchrotron geislun

Rafeindaverkfræði

Hönnun smíði og forritun mælitækja

Nanótækni ræktun nanórása með STM

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