Blar i NTNU Open på forfatter "Wahlström, Erik"

Viser treff 1-13 av 13

    • Describing synchronization and topological excitations in arrays of magnetic spin torque oscillators through the Kuramoto model 

      Flovik, Vegard; Macia, Ferran; Wahlström, Erik (Journal article; Peer reviewed, 2016)
      The collective dynamics in populations of magnetic spin torque oscillators (STO) is an intensely studied topic in modern magnetism. Here, we show that arrays of STO coupled via dipolar fields can be modeled using a variant ...

    • In-plane structural order of domain engineered La0.7Sr0.3MnO3 thin films 

      Boschker, Jos Emiel; Monsen, Åsmund Fløystad; Nord, Magnus Kristofer; Mathieu, Roland; Grepstad, Jostein; Holmestad, Randi; Wahlström, Erik; Tybell, Thomas (Journal article, 2013)
      We present a detailed structural study of tensile-strained La0.7Sr0.3MnO3 thin films. We use the substrate miscut to control the number of rhombohedral variants in the films and study the in-plane order and structural ...

    • Magnetically Enhanced Mechanical Stability and Super-Size Effects in Self-Assembled Superstructures of Nanocubes 

      Håkonsen, Verner; Singh, Gurvinder; Normile, Peter S; De Toro, Jose Angel; Wahlström, Erik; He, Jianying; Zhang, Zhiliang (Journal article; Peer reviewed, 2019)
      Artificial materials from the self‐assembly of magnetic nanoparticles exhibit extraordinary collective properties; however, to date, the contribution of nanoscale magnetism to the mechanical properties of this class of ...

    • Magnetization dynamics in nanostructures 

      Flovik, Vegard (Doctoral theses at NTNU;2016:360, Doctoral thesis, 2016)
      Summary of thesis: Understanding the properties of magnetic structures when confined to nanoscale dimensions is of both fundamental interest, as well as of importance for the development of modern electronics technology. ...

    • Magneto-dynamic properties of complex oxide—La0.7Sr0.3MnO3/SrTiO3— heterostructure interface 

      Singh, Suraj Kumar; Bolstad, Torstein; Hallsteinsen, Ingrid; Tybell, Per Thomas Martin; Wahlström, Erik (Journal article; Peer reviewed, 2019)
      We have studied the interface magnetodynamic properties of La0.7Sr0.3MnO3/SrTiO3 (111) heterostructures by Ferromagnetic resonance spectroscopy (FMR). In addition to the bulk FMR mode, the measurements indicate a mode ...

    • Magneto-dynamic properties of thin films and interfaces 

      Singh, Suraj Kumar (Doctoral theses at NTNU;2020:278, Doctoral thesis, 2020)
      Magnonics is a developing branch in the field of condensed matter physics with the potential to fulfill the future demand for miniaturized, fast, and energy-efficient spintronics devices. This thesis explores both a novel ...

    • Magnetodynamic properties of dipole-coupled 1D magnonic crystals 

      Singh, Suraj Kumar; Wang, Xiansi; Kumar, Ankit; Qaiumzadeh, Alireza; Svedlindh, Peter; Tybell, Per Thomas Martin; Wahlström, Erik (Journal article, 2021)
      Magnonic crystals are magnetic metamaterials, that provide a promising way to manipulate magnetodynamic properties by controlling the geometry of the patterned structures. Here, we study the magnetodynamic properties of ...

    • Normal and superfluid spin dynamics in magnetic insulator heterostructures 

      Skarsvåg, Hans Langva (Doctoral theses at NTNU;2016:334, Doctoral thesis, 2016)
      Summary of thesis: Normal and superfluid spin dynamics in magnetic insulator heterostructures In this thesis, the results of six research papers on spintronics-related effects are presented. The main focus is on ...

    • Projektbaserad labundervisning inom grundläggande fysik för civilingenjörsstudenter 

      Wahlström, Erik; Persson, Rolf Jonas (Peer reviewed; Journal article, 2015)
      Vi presenterar resultat från en pågående omläggning av laborationerna i fysik för civilingenjörsstudenter till en projektbaserad arbetsform baserad på enkla försök med tydliga ingenjörsbetonade uppgifter. Studenternas svar ...

    • Propagation properties of spin wave in Co2FeAl Heusler alloy ultrathin films 

      Singh, Suraj Kumar; Gupta, Nanhe Kumar; Hait, Soumyarup; Chaudhary, Sujeet; Tybell, Thomas; Wahlström, Erik (Peer reviewed; Journal article, 2021)
      We report an investigation of spin wave propagation in ion beam sputtered Co2FeAl Heusler alloy thin film on Si(100) substrate. The spin wave transmission spectra measured at fixed frequencies by sweeping the external ...

    • Reconfigurable Mechanical Anisotropy in Self-Assembled Magnetic Superstructures 

      Håkonsen, Verner; Singh, Gurvinder; De Toro, Jose Angel; Normile, Peter S; Wahlström, Erik; He, Jianying; Zhang, Zhiliang (Peer reviewed; Journal article, 2021)
      Enhancement of mechanical properties in self-assembled superstructures of magnetic nanoparticles is a new emerging aspect of their remarkable collective behavior. However, how magnetic interactions modulate mechanical ...

    • Spin pumping, spin transfer, and spin Hall effects in magnetic insulator-normal metal systems 

      Kapelrud, André (Doctoral theses at NTNU;2017:220, Doctoral thesis, 2017)
      This thesis presents four research papers on two topics within the field of spintronics. Three of the papers present theoretical models concerned with the topics of spin wave mode-dependent spin pumping, spin transfer, and ...

    • Twinned-domain-induced magnonic modes in epitaxial LSMO/STO films 

      Wahlström, Erik; Macia, Ferran; Boschker, Jos Emiel; Monsen, Åsmund Fløystad; Nordblad, Per; Mathieu, Roland; Kent, Andrew D.; Tybell, Thomas (Journal article; Peer reviewed, 2017)
      The use of periodic magnetic structures to control the magneto-dynamic properties of materials— magnonics—is a rapidly developing field. In the last decade, a number of studies have shown that metallic films can be patterned ...