Now showing items 21-40 of 49

    • Ferroelectric Domain Engineering Using Structural Defect Ordering 

      Gradauskaite, Elzbieta; Hunnestad, Kasper Aas; Meier, Quintin; Meier, Dennis; Trassin, Morgan (Peer reviewed; Journal article, 2022)
      Ferroelectrics have become indispensable in the development of energy-efficient oxide electronics. Their domain state is closely linked to the final device functionality, making domain engineering in technology-compatible ...
    • FIB and Functional Ferroics: Structuring and Correlated Microscopy 

      Roede, Erik Dobloug (Doctoral theses at NTNU;2022:156, Doctoral thesis, 2022)
      Norsk sammendrag FIB og funksjonelle ferroiske materialer For å fortsette utviklingen av raskere og mer energieffektiv elektronikk er vi nødt til å utnytte nye fysiske fenomener. I dette arbeidet studeres ferroiske ...
    • FIB lift-out of conducting ferroelectric domain walls in hexagonal manganites 

      Mosberg, Aleksander Buseth; Roede, Erik Dobloug; Evans, Donald; Holstad, Theodor S.; Bourret, Edith; Yan, Zewu; Van Helvoort, Antonius; Meier, Dennis (Journal article; Peer reviewed, 2019)
      A focused ion beam (FIB) methodology is developed to lift out suitable specimens containing charged domain walls in improper ferroelectric ErMnO3. The FIB procedure allows for extracting domain wall sections with well-defined ...
    • First-principles study of topologically protected vortices and ferroelectric domain walls in hexagonal YGaO3 

      Småbråten, Didrik Rene; Nakata, Ayako; Meier, Dennis; Miyazaki, Tsuyoshi; Selbach, Sverre Magnus (Peer reviewed; Journal article, 2020)
      Ferroelectric behavior on the meso- and macroscopic scale depends on the formation and dynamics of domains and controlling the domain patterns is imperative to device performance. While density functional theory (DFT) ...
    • Frequency dependent polarisation switching in h-ErMnO3 

      Ruff, Alexander; Li, Ziyu; Loidl, Alois; Schaab, Jakob; Fiebig, Manfred; Cano, Andres; Yan, Zewu; Bourret, Edith; Glaum, Julia; Meier, Dennis; Krohns, Stephan (Journal article; Peer reviewed, 2018)
      We report an electric-field poling study of the geometric-driven improper ferroelectric h-ErMnO3. From a detailed dielectric analysis we deduce the temperature and frequency dependent range for which single-crystalline ...
    • Global formation of topological defects in the multiferroic hexagonal manganites 

      Meier, Quintin Noel; Lilienblum, Martin; Griffin, Sinead M; Conder, K; Pomjakushina, Ekaterina; Yan, Zewu; Bourret, Edith; Meier, Dennis; Lichtenberg, Frank; Salje, Ekhard K. H.; Spaldin, Nicola A.; Fiebig, Manfred; Cano, Andrés (Journal article; Peer reviewed, 2017)
      The spontaneous transformations associated with symmetry-breaking phase transitions generate domain structures and defects that may be topological in nature. The formation of these defects can be described according to the ...
    • Introducing a Dynamic Reconstruction Methodology for Multilayered Structures in Atom Probe Tomography 

      hatzoglou, constantinos; Da Costa, Grald; Wells, Peter; Ren, Xiaochen; Geiser, Brian P; Larson, David J; Demoulin, Remi; Hunnestad, Kasper Aas; Talbot, Etienne; Mazumder, Baishakhi; Meier, Dennis; Vurpillot, François (Peer reviewed; Journal article, 2023)
      Atom probe tomography (APT) is a powerful three-dimensional nanoanalyzing microscopy technique considered key in modern materials science. However, progress in the spatial reconstruction of APT data has been rather limited ...
    • Local dynamics of topological magnetic defects in the itinerant helimagnet FeGe 

      Dussaux, Antoine; Schoenherr, Peggy; Koumpouras, Konstantinos; Chico, Jonathan; Chang, Kevin; Lorenzelli, Luca; Kanazawa, Naoya; Tokura, Yoshinori; Garst, Markus; Bergman, Anders; Degen, Christian L.; Meier, Dennis (Journal article; Peer reviewed, 2016)
      Chiral magnetic interactions induce complex spin textures including helical and conical spin spirals, as well as particle-like objects such as magnetic skyrmions and merons. These spin textures are the basis for innovative ...
    • Magnetoelastic properties of multiferroic hexagonal ErMnO<inf>3</inf> 

      Fernandez-Posada, C.M.; Haines, C.R.S.; Evans, Donald; Yan, Z.; Bourret, E.; Meier, Dennis; Carpenter, M.A. (Journal article; Peer reviewed, 2022)
    • Magnetoelectric force microscopy on antiferromagnetic 180 degree domains in Cr2O3 

      Schoenherr, Peggy; Giraldo, L. M.; Lilienblum, Martin; Trassin, Morgan; Meier, Dennis; Fiebig, Manfred (Journal article; Peer reviewed, 2017)
      Magnetoelectric force microscopy (MeFM) is characterized as methodical tool for the investigation of antiferromagnetic domain states, in particular of the 180 ∘ variety. As reference compound for this investigation we use ...
    • Magnetoelectric inversion of domain patterns 

      Leo, Naemi; Carolus, Vera; White, Jonathan S.; Kenzelmann, Michel; Hudl, Matthias; Tolédano, Pierre; Honda, T.; Kimura, Tsuyoshi; Ivanov, S. A.; Weil, M.; Lottermoser, Thomas; Meier, Dennis; Fiebig, Manfred (Journal article; Peer reviewed, 2018)
      The inversion of inhomogeneous physical states has great technological importance; for example, active noise reduction relies on the emission of an inverted sound wave that interferes destructively with the noise of the ...
    • Measuring ferroelectric order parameters at domain walls and vortices in hexagonal manganites with atomic resolution STEM 

      Holtz, Megan, E.; Shapovalov, Konstantin; Mundy, Julia; Chang, C. S.; Meier, Dennis; Cano, Andrés; Muller, David A. (Journal article; Peer reviewed, 2017)
    • Moiré fringes in conductive atomic force microscopy 

      Richarz, Leonie; He, J.; Ludacka, Ursula; Bourret, E.; Yan, Z.; Van Helvoort, Antonius; Meier, Dennis (Journal article; Peer reviewed, 2023)
      Moiré physics plays an important role in characterization of functional materials and engineering of physical properties in general, ranging from strain-driven transport phenomena to superconductivity. Here, we report on ...
    • Molecular Dynamics Simulation of the Graphite-Electrolyte Interface in Lithium-Ion Batteries 

      Puntervold, Astrid Harboe (Master thesis, 2023)
      Energilagring er nøkkelen for å muliggjøre effektiv utnyttelse av fornybare energikilder. Prognoser viser at den globale etterspørselen etter litium-ion-batterier forventes en årlig vekst på rundt 33 % innen 2030. Selv ...
    • Nano-Engineering for Functional Ferroelectric Domain Walls 

      Tokle, Egil Ytterli (Master thesis, 2024)
      I over eit tiår har ferroelektriske domenveggar fått stor merksemd i søket etter nyskapande system for framtidig nanoteknologi grunna i dei unike eigenskapane som oppstår i slike avgrensa område. Særleg er den lokale leieevna ...
    • Nanoscale Chemical Analysis of Ferroic Materials and Phenomena 

      Hunnestad, Kasper Aas (Doctoral theses at NTNU;2023:397, Doctoral thesis, 2023)
      The discovery of new physical phenomena in materials is closely linked to the progress in characterization and is propelled by the ability to observe and study physical processes occurring at the atomic level. Newly ...
    • Novel Topological Spin Solitons for Spintronics Applications 

      Lysne, Erik (Doctoral theses at NTNU;2021:227, Doctoral thesis, 2021)
      Topologically non-trivial spin solitons, such as skyrmions and magnetic edge dislocations, are particle-like nanoscale configurations in the magnetization field. In solid state systems, they can be written, moved, and ...
    • Observation of cation-specific critical behavior at the improper ferroelectric phase transition in Gd2(MoO4)3 

      Nylund, Inger-Emma; Tsoutsouva, Maria; Grande, Tor; Meier, Dennis (Journal article; Peer reviewed, 2022)
    • Observation of Electric-Field-Induced Structural Dislocations in a Ferroelectric Oxide 

      Evans, Donald; Småbråten, Didrik Rene; Holstad, Theodor Secanell; Vullum, Per Erik; Mosberg, Aleksander Buseth; Yan, Zewu; Bourret, Edith; Van Helvoort, Antonius; Selbach, Sverre Magnus; Meier, Dennis (Peer reviewed; Journal article, 2021)
      Dislocations are 1D topological defects with emergent electronic properties. Their low dimensionality and unique properties make them excellent candidates for innovative device concepts, ranging from dislocation-based ...
    • Observation of uncompensated bound charges at improper ferroelectric domain walls 

      Schoenherr, Peggy; Shapovalov, Konstantin; Schaab, Jakob; Yan, Zewu; Bourret, Edith; Hentschel, Mario; Stengel, Massimiliano; Fiebig, Manfred; Cano, Andrés; Meier, Dennis (Journal article; Peer reviewed, 2019)
      Low-temperature electrostatic force microscopy (EFM) is used to probe unconventional domain walls in the improper ferroelectric semiconductor Er0.99Ca0.01MnO3 down to cryogenic temperatures. The low-temperature EFM maps ...