• Controlling Phase Purity and Texture of K0.5Na0.5NbO3 Thin Films by Aqueous Chemical Solution Deposition 

      Gaukås, Nikolai Helth; Dale, Silje Marie; Ræder, Trygve Magnus; Toresen, Andreas; Holmestad, Randi; Glaum, Julia; Einarsrud, Mari-Ann; Grande, Tor (Journal article; Peer reviewed, 2019)
      Aqueous chemical solution deposition (CSD) of lead-free ferroelectric K0.5Na0.5NbO3 (KNN) thin films has a great potential for cost-effective and environmentally friendly components in microelectronics. Phase purity of KNN ...
    • Epitaxial K0.5Na0.5NbO3 thin films by aqueous chemical solution deposition 

      Pham, Ky-Nam; Gaukås, Nikolai Helth; Morozov, Maxim; Tybell, Per Thomas Martin; Vullum, Per Erik; Grande, Tor; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2019)
      We report on an environmentally friendly and versatile aqueous chemical solution deposition route to epitaxial K0.5Na0.5NbO3 (KNN) thin films. The route is based on the spin coating of an aqueous solution of soluble ...
    • Ferroelectric and dielectric properties of Ca2+-doped and Ca2+-Ti4+ co-doped K0.5Na0.5NbO3 thin films 

      Gaukås, Nikolai Helth; Glaum, Julia; Einarsrud, Mari-Ann; Grande, Tor (Journal article; Peer reviewed, 2020)
      Chemical solution deposition (CSD) of K0.5Na0.5NbO3 (KNN) thin films on silicon-based substrates is an interesting technology for fabrication of lead-free ferroelectric thin films. Here, we report on improved ferroelectric ...
    • Flexible, biocompatible lead-free piezoelectric thin films for biomedical applications 

      Klaussen, Ragnhild Hyllnes (Master thesis, 2019)
      I dette masterprosjektet ble fleksible, faserene, piezoelektriske kalium-natrium niobat (KNN) tynnfilmer produsert ved å legge en KNN tynnfilm på et termisk stabilt substrat og deretter overføre filmen til en fleksibel ...
    • Interstitial oxygen as a source of p-type conductivity in hexagonal manganites 

      Skjærvø, Sandra Helen; Tjønneland Wefring, Espen; Nesdal, Silje K.; Gaukås, Nikolai Helth; Olsen, Gerhard Henning; Glaum, Julia; Tybell, Per Thomas Martin; Selbach, Sverre Magnus (Journal article; Peer reviewed, 2016)
      Hexagonal manganites, h-RMnO3 (R=Sc, Y, Ho–Lu), have been intensively studied for their multiferroic properties, magnetoelectric coupling, topological defects and electrically conducting domain walls. Although point defects ...
    • Lead-Free Ferroelectric KNN Films for Biomedical Applications 

      Gaukås, Nikolai Helth (Doctoral theses at NTNU;2020:246, Doctoral thesis, 2020)
      Ferroelectric materials are utilized in a wide range of different electronic devices throughout our modern society, including all kinds of consumer electronics, ultrasound equipment, minimally invasive surgical tools and ...
    • Lead-free piezoelectric materials for medical application 

      Dale, Silje Marie (Master thesis, 2018)
      In this work, K0.5Na0.5NbO3, (KNN) and K0.495Na0.495Ca0.005NbO3 thin films for biomedical applications have been prepared from an aqueous precursor solutions with 2.5 or 5.0 mol% of alkali excess. Ca2+ was introduced as ...
    • The Effect of Donor Doping with Ti4+ on the Oxygen Absorption Properties of h-YMnO3 

      Gaukås, Nikolai Helth (Master thesis, 2016)
      In this thesis, the effect of donor doping with Ti4+ on the oxygen absorption properties in the hexagonal rare-earth magnanite h-YMnO3 was studied and compared to undoped compounds of the same material class. Bulk-sized ...