• All-optical Magnetisation Switching in Two-dimensional Metallic Ferro- and Antiferromagnetic Systems 

      Krogen, Andreas Sandø (Master thesis, 2018)
      Motivated by recent experimental and theoretical work on ultrafast optical switching of magnetic order in ferromagnetic and antiferromagnetic materials, we study the influence of polarised light on the spin polarisation ...
    • Anisotropies and magnetic phase transitions in insulating antiferromagnets determined by a Spin-Hall magnetoresistance probe 

      Lebrun, Romain; Ross, Andrew; Gomonay, Olena; Bender, Scott A.; Baldrati, Lorenzo; Kronast, Florian; Qaiumzadeh, Alireza; Sinova, Jairo; Brataas, Arne; Duine, Rembert; Klaui, Mathias Michael (Journal article; Peer reviewed, 2019)
      Antiferromagnets possess a number of intriguing and promising properties for electronic devices, which include a vanishing net magnetic moment and thus insensitivity to large magnetic fields and characteristic terahertz ...
    • Chiral ferromagnetism beyond Lifshitz invariants 

      Ado, I. A.; Qaiumzadeh, Alireza; Brataas, Arne; Titov, M. (Peer reviewed; Journal article, 2020)
      We consider a contribution w ch to the micromagnetic energy density that is linear with respect to the first spatial derivatives of the local magnetization direction. For a generalized two-dimensional Rashba ferromagnet, ...
    • Current-Driven Dynamics of Magnetic Hopfions 

      Wang, Xiansi; Qaiumzadeh, Alireza; Brataas, Arne (Journal article; Peer reviewed, 2019)
      opological magnetic textures have attracted considerable interest since they exhibit new properties and might be useful in information technology. Magnetic hopfions are three-dimensional (3D) spatial variations in the ...
    • Scattering theory of transport through disordered magnets 

      Jakobsen, Martin Fonnum; Qaiumzadeh, Alireza; Brataas, Arne (Journal article; Peer reviewed, 2019)
      We present a scattering theory of transport through noncollinear disordered magnetic insulators. For concreteness, we study and compare the random field model (RFM) and the random anisotropy model (RAM). The RFM and RAM ...
    • Spin dynamics in magnetic structures: A numerical study 

      Wirak, Mette (Master thesis, 2019)
      Spintronikk foreslår en alterativ måte å gjøre datalagring på, som vil kunne være både mer effektiv og raskere. Grunnlaget for forskningsfeltet er den kvantemekaniske egenskapen spinn, som gjennom spinnbølger kan forflyttes ...
    • Spin Superfluidity in Biaxial Antiferromagnetic Insulators 

      Qaiumzadeh, Alireza; Skarsvåg, Hans Langva; Holmqvist, Cecilia; Brataas, Arne (Journal article; Peer reviewed, 2017)
      Antiferromagnets may exhibit spin superfluidity since the dipole interaction is weak. We seek to establish that this phenomenon occurs in insulators such as NiO, which is a good spin conductor according to previous studies. ...
    • Spin-orbit-induced dynamics of magnetic textures 

      Kristiansen, Lars André (Master thesis, 2017)
      We investigate the effect of the relativistic spin-orbit interaction on the dynamics of both ferromagnetic and antiferromagnetic domain walls driven by spin waves. Initially, we derive the free energy and the equations of ...
    • Theory of Antisymmetric Exchange in Metallic Antiferromagnetic Thin Films 

      Hanslin, Sander Øglænd (Master thesis, 2019)
      Den antisymmetriske Dzyaloshinskii-Moriya interaksjonen (DMI) er viktig for stabilisering av ikke-kollineære magnetiske faser. Ved å sammenligne uttrykket for mikromagnetisk fri energi med den feltteoretiske partisjonsfunksjonen, ...
    • Thermoelectric Properties of (Anti)ferromagnet - Superconductor Hybrid Junctions 

      Naess, Kristian (Master thesis, 2019)
      Denne masteroppgaven undersøker de termiske egenskapene til både en ferromagnet-superleder overgang og en antiferromagnet-superleder overgang. Målet med oppgaven er å utlede, grafisk fremstille og evaluere termisk ledningsevne, ...
    • Ultrafast control of spin interactions in honeycomb antiferromagnetic insulators 

      Losada, Juan Manuel; Brataas, Arne; Qaiumzadeh, Alireza (Journal article; Peer reviewed, 2019)
      Light enables the ultrafast, direct, and nonthermal control of the exchange and Dzyaloshinskii-Moriya interactions. We consider two-dimensional honeycomb lattices described by the Kane-Mele-Hubbard model at half filling ...
    • Ultrafast manipulation of Heisenberg exchange and Dzyaloshinskii–Moriya interactions in antiferromagnetic insulators 

      Losada, Juan Manuel (Master thesis, 2019)
      Light enables ultrafast, direct and nonthermal control of the exchange and Dzyaloshinskii-Moriya interactions. We consider two-dimensional honeycomb lattices described by the Kane-Mele-Hubbard model at half filling and in ...