Browsing Kjemisk institutt by Author "Fjellvåg, Øystein Slagtern"

Now showing items 1-7 of 7

  • Intense NIR emission in YVO4:Yb3+ thin films by atomic layer deposition 
    Getz, Michael; Hansen, Per-Anders Stensby; Fjellvåg, Øystein Slagtern; Ahmed, Mohammed Amin Karim; Fjellvåg, Helmer; Nilsen, Ola (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    We demonstrate controlled deposition by atomic layer deposition of YVO4:Yb3+ thin films exhibiting an intense NIR emission under UV excitation after post-deposition annealing at 1000 °C. The samples are deposited using the ...
  • New Insights into Hydride Bonding, Dynamics, and Migration in La2LiHO3 Oxyhydride 
    Fjellvåg, Øystein Slagtern; Armstrong, Jeff; Vajeeston, Ponniah; Sjåstad, Anja Olafsen (Journal article / Tidsskriftartikkel / SubmittedVersion, 2018)
    Hydride anion-conducting oxyhydrides have recently emerged as a brand new class of ionic conductors. Here we shed a first light onto their local vibrations, bonding mechanisms, and anion migration properties using the ...
  • Order-to-Disorder Transition and Hydrogen Bonding in the Jahn-Teller Active NH4CrF3 Fluoroperovskite 
    Fjellvåg, Øystein Slagtern; Gonano, Bruno; Bernal, Fabian Leonardo Martinez; Amedi, Salah Bra; Lyu, Jike; Pomjakushin, Vladimir; Medarde, Marisa; Chernyshov, Dmitry; Marshall, Kenneth; Valldor, Björn Martin; Fjellvåg, Helmer; Hauback, Bjørn Christian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2024)
    Large quantities of high-purity NH4CrF3 have been synthesized using a wet-chemical method, and its structural chemistry and magnetic properties are investigated in detail for the first time. NH4CrF3 is a tetragonal ...
  • Oxyhydrides – Synthesis, Crystal Structure and Properties 
    Fjellvåg, Øystein Slagtern (Doctoral thesis / Doktoravhandling, 2019)
    This thesis focus on the research of the new and scarcely explored material class oxyhydrides, where the anionic lattice consists of both oxide and hydride anions. Selected oxyhydrides described by the formula La2‑xNdxLiHO3 ...
  • Thermal and Structural Aspects of the Hydride-Conducting Oxyhydride La2LiHO3 Obtained via a Halide Flux Method 
    Fjellvåg, Øystein Slagtern; Armstrong, Jeff; Slawinski, Wojciech Andrzej; Sjåstad, Anja Olafsen (Journal article / Tidsskriftartikkel / SubmittedVersion, 2017)
    Oxyhydrides, in which oxide and hydride anions share the same anionic lattice, are relatively rare compounds. La2LiHO3 belongs to this family. We report the synthesis of La2LiHO3 by means of an alkali halide flux method, ...
  • X-ray and Neutron Diffraction Studies of SrTe2FeO6Cl, an Oxide Chloride with Rare Anion Ordering 
    Sannes, Johnny Andreas; Gonano, Bruno; Fjellvåg, Øystein Slagtern; Kumar, Susmit; Nilsen, Ola; Valldor, Björn Martin (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    The oxychloride SrTe2FeO6Cl is obtained by high-temperature solid-state synthesis under inert conditions in closed reaction vessels. The compound crystallizes in a novel monoclinic crystal structure that is described in ...
  • The α and γ plasma modes in plasma-enhanced atomic layer deposition with O2-N2 capacitive discharges 
    Napari, M; Tarvainen, O; Kinnunen, S; Arstila, K; Julin, J; Fjellvåg, Øystein Slagtern; Weibye, Kristian; Nilsen, Ola; Sajavaara, T (Journal article / Tidsskriftartikkel / SubmittedVersion, 2017)
    Two distinguishable plasma modes in the O2–N2 radio frequency capacitively coupled plasma (CCP) used in remote plasma-enhanced atomic layer deposition (PEALD) were observed. Optical emission spectroscopy and spectra ...