Now showing items 21-33 of 33

    • Nanocomposites of few-layer graphene oxide and alumina by density functional theory calculations 

      Polfus, Jonathan M.; Løvvik, Ole Martin; Rørvik, Per Martin; Bredesen, Rune (Peer reviewed; Journal article, 2016)
      The atomistic and electronic structure and oxygen stoichiometry of nanocomposites between alumina and graphene oxide were investigated by density functional theory calculations. The nanocomposite was described as interfaces ...
    • New structure and insight on the phase transition within the Cu-Pd-Sn system with 25 at. % Sn 

      Amundsen, Monika; Pike, Nicholas; Løvvik, Ole Martin; Almeida Carvalho, Patricia; Gunnæs, Anette Eleonora (Peer reviewed; Journal article, 2022)
    • Oxygen nonstoichiometry in (Ca2CoO3)0.62(CoO2): a combined experimental and computational study 

      Schrade, Matthias; Casolo, Simone; Graham, Paul J.; Ulrich, Clemens; Li, Sean; Løvvik, Ole Martin; Finstad, Terje; Norby, Truls (Peer reviewed; Journal article, 2014)
      The oxygen nonstoichiometry in the misfit calcium cobaltite (Ca2CoO3)0.62(CoO2) has been studied experimentally and by density functional theory (DFT) calculations. The standard oxidation enthalpy ΔH0Ox of oxygen deficient ...
    • Prediction of solute diffusivity in Al assisted by first-principles molecular dynamics 

      Løvvik, Ole Martin; Sagvolden, Espen; Li, Yanjun (Peer reviewed; Journal article, 2014)
      Ab initio calculations of the solid-state diffusivity of solute atoms in bulk aluminium have previously been based on transition state theory (TST), employing transition state searches and systematic assessments of single ...
    • Probing the structural evolution and its impact on magnetic properties of FeCoNi(AlMn)x high-entropy alloy at the nanoscale 

      Bazioti, Kalliopi; Løvvik, Ole Martin; Poulia, Anthoula; Almeida Carvalho, Patricia; S. Azar, Amin; Mikheenko, Pavlo; Diplas, Spyridon; Gunnæs, Anette Eleonora (Peer reviewed; Journal article, 2022)
      We report the first nanoscale investigation of FeCoNi(AlMn)x high-entropy alloys (HEAs) processed by laser metal deposition. The structural evolution of the alloy upon chemical composition variation (0.2 ≤ x ≤ 1.5) was ...
    • A Review of Eutectic Au-Ge Solder Joints 

      Larsson, Andreas; Tollefsen, Torleif Andre; Løvvik, Ole Martin; Aasmundtveit, Knut (Journal article; Peer reviewed, 2019)
      Gold-germanium (Au-Ge) joints have been part of the electronics industry since the birth of the solid state transistor. Today they find their role as a reliable joining technology, especially for high-temperature applications. ...
    • A Roadmap for Transforming Research to Invent the Batteries of the Future Designed within the European Large Scale Research Initiative BATTERY 2030+ 

      Amici, Julia; Asinari, Pietro; Ayerbe, Elixabete; Barboux, Philippe; Bayle-Guillemaud, Pascale; Behm, R. Juergen; Berecibar, Maitane; Berg, Erik; Bhowmik, Arghya; Bodoardo, Silvia; Castelli, Ivano E.; Cekic-Laskovic, Isidora; Christensen, Rune; Clark, Simon; Diehm, Ralf; Dominko, Robert; Fichtner, Maximilian; Franco, Alejandro A.; Grimaud, Alexis; Guillet, Nicolas; Hahlin, Maria; Hartmann, Sarah; Heiries, Vincent; Hermansson, Kersti; Heuer, Andreas; Jana, Saibal; Jabbour, Lara; Kallo, Josef; Latz, Arnulf; Lorrmann, Henning; Løvvik, Ole Martin; Lyonnard, Sandrine; Meeus, Marcel; Paillard, Elie; Perraud, Simon; Placke, Tobias; Punckt, Christian; Raccurt, Oliver; Ruhland, Janna; Sheridan, Edel Maria; Stein, Helge; Tarascon, Jean-Marie; Trapp, Victor; Vegge, Tejs; Weil, Marcel; Wentzel, Wolfgang; Winter, Martin; Wolf, Andreas; Edström, Kristina (Peer reviewed; Journal article, 2022)
      This roadmap presents the transformational research ideas proposed by “BATTERY 2030+,” the European large-scale research initiative for future battery chemistries. A “chemistry-neutral” roadmap to advance battery research, ...
    • Screening of thermoelectric silicides with atomistic transport calculations 

      Løvvik, Ole Martin; Flage-Larsen, Espen; Skomedal, Gunstein (Peer reviewed; Journal article, 2020)
      More than 1000 crystalline silicide materials have been screened for thermoelectric properties using first-principles atomistic calculations coupled with the semi-classical Boltzmann transport equation. Compounds that ...
    • Thermoelectric transport trends in group 4 half-Heusler alloys 

      Berland, Kristian; Shulumba, Nina; Hellman, Olle; Persson, Clas; Løvvik, Ole Martin (Journal article; Peer reviewed, 2019)
      The thermoelectric properties of 54 different group 4 half-Heusler (HH) alloys have been studied from first principles. Electronic transport was studied with density functional theory using hybrid functionals facilitated ...
    • Thin films made by reactive sputtering of high entropy alloy FeCoNiCuGe: Optical, electrical and structural properties 

      Mayandi, Jeyanthinath; Finstad, Terje Gunnar; Dahl, Øystein; Ponniah, Vajeeston; Schrade, Matthias; Løvvik, Ole Martin; Diplas, Spyridon; Almeida Carvalho, Patricia (Peer reviewed; Journal article, 2022)
      Films were reactively sputtered from a high entropy alloy (HEA) FeCoNiCuGe target in an Ar/O2 plasma. The case of zero O2 gas flow yielded HEA films of FeCoNiCuGe. These as-deposited HEA films have a face centered cubic ...
    • Twinnability of Al–Mg alloys: A first-principles interpretation 

      Zhao, Dongdong; Løvvik, Ole Martin; Marthinsen, Knut; Li, Yanjun (Journal article; Peer reviewed, 2017)
    • Vacancy diffusion in palladium hydrides 

      Polfus, Jonathan; Peters, Thijs; Bredesen, Rune; Løvvik, Ole Martin (Peer reviewed; Journal article, 2021)
      The self-diffusion coefficients of palladium in PdHx (x = 0, 0.25, 0.5, 0.75, 1) were studied using density functional theory to obtain the required thermodynamic and kinetic parameters. The enthalpy of migration decreased ...
    • Valence charge distribution in homogenous silicon-aluminium thin-films 

      Thøgersen, Annett; Jensen, Ingvild Julie Thue; Stange, Marit Synnøve Sæverud; Røyset, Arne Karstein; Løvvik, Ole Martin; Ulyashin, Alexander; Diplas, Spyridon (Peer reviewed; Journal article, 2018)
      Homogenous aSi1−xAlxHy alloyed thin films, made by magnetron sputtering, has been found to exhibit tunable band gap and dielectric constant depending on their composition. The optical properties of alloys are largely defined ...