Browsing Institutt for fysikk by Title
Now showing items 817-836 of 1740
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Macromolecular interactions at the single-molecule level - Fluctuation analysis of bound states
(Master thesis, 2018)The recognition, binding and release of macromolecules are precisely orchestrated in a stochastic interplay governing all enzymatic, immunological and cellular processes. Deciphering this complex synergy in order to ... -
Magnetic and Thermodynamic Properties of Layered and Thin Film Superconductors
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:63, Doctoral thesis, 2004)A large variety of measurements, most of magnetic nature, performed on single crystals of high temperature superconductors and thin films of lead, are presented. Furthermore, numerical calculations of the magnetic properties ... -
Magnetic domain configuration of (111)-oriented LaFeO3 epitaxial thin films
(Journal article; Peer reviewed, 2017)In antiferromagnetic spintronics control of the domains and corresponding spin axis orientation is crucial for devices. Here we investigate the antiferromagnetic axis in (111)-oriented LaFeO3/SrTiO3, which is coupled to ... -
Magnetic flux density measurements and mobile phone provocation studies: Investigations in the 50 Hz and the mobile phone frequency regions
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:114, Doctoral thesis, 2007)The aims of this thesis work were divided into two main areas. The first area was an investigation of the extremely low frequency magnetic fields in urban environment and from electrical devices. The second area was mobile ... -
Magnetic Resonance Imaging: Multidimensional non-Gaussian Diffusion-weighted MRI - Image quality analysis
(Master thesis, 2015)To investigate the viability of two different nuclear magnetic resonance imaging systems for acquisition of highly diffusion weighted, multidimensional human brain data, images were acquired on both, using two different ... -
Magnetization Dissipation in Bulk Ferromagnets and Ferromagnetic Quantum Dots
(Master thesis, 2014)We study the magnetization dynamics of a nano-scale ferromagnet. We show that the phenomenological Landau-Lifschitz-Gilbert predicts a damped precession of the magnetization. The ferromagnet is coupled to two large reservoirs ... -
Magnetization dynamics and Majorana fermions in ferromagnetic Josephson junctions along the quantum spin Hall edge
(Journal article; Peer reviewed, 2011)We investigate the interplay between ferromagnetic and superconducting order at the edge of a quantum spin Hall insulator. Using complementary analytical and self-consistent numerical approaches, we study a ferromagnetic ... -
Magnetization Dynamics and Spinsupercurrents in Superconductingand Multiferroic Systems
(Doctoral thesis at NTNU;2016:5, Doctoral thesis, 2016)This thesis presents the research findings from three articles which have been published or submitted for publication. In the first article, we study the magnetization dynamics and anomalous supercurrent that can arise ... -
Magnetization dynamics in nanostructures
(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. ... -
Magnetization dynamics of a ferromagnet embedded in a Josephson junction with a spin-orbit coupled element
(Master thesis, 2018)We investigate the free energy of Andreev bound states (ABS) in a Josephson junction containing a ferromagnet and an element where broken inversion symmetry produces Rashba spin-orbit coupling. Applying an extended ... -
Magnetization reorientation due to the superconducting transition in heavy-metal heterostructures
(Journal article; Peer reviewed, 2019)Recent theoretical and experimental work has demonstrated how the superconducting critical temperature (Tc) can be modified by rotating the magnetization of a single homogeneous ferromagnet proximity-coupled to the ... -
Magneto-dynamic properties of complex oxide—La0.7Sr0.3MnO3/SrTiO3— heterostructure interface
(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
(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 ... -
Magnon decay theory of Gilbert damping in metallic antiferromagnets
(Peer reviewed; Journal article, 2020)Gilbert damping is a key property governing magnetization dynamics in ordered magnets. We present a theoretical study of intrinsic Gilbert damping induced by magnon decay in antiferromagnetic metals through s−d exchange ... -
Magnon Excitations of a Dzyaloshinskii-Moriya Coupled Insulating 2D Antiferromagnetic Skyrmion
(Master thesis, 2018)Motivated by recent experimental progress in realizing novel antiferromagnetic phases with state-of-the-art characteristics for memory storage and information processing, we study the magnon excitation spectra and eigenmodes ... -
Magnon-Mediated Indirect Exciton Condensation through Antiferromagnetic Insulators
(Journal article; Peer reviewed, 2019)Electrons and holes residing on the opposing sides of an insulating barrier and experiencing an attractive Coulomb interaction can spontaneously form a coherent state known as an indirect exciton condensate. We study a ... -
Magnon-mediated superconductivity on the surface of a topological insulator
(Journal article; Peer reviewed, 2020)We study superconductivity on the surface of a topological insulator, mediated by magnetic fluctuations in an adjacent ferromagnetic or antiferromagnetic insulator. Superconductivity can arise from effective interactions ... -
Magnon-polarons in cubic collinear antiferromagnets
(Peer reviewed; Journal article, 2019)We present a theoretical study of excitations formed by hybridization between magnons and phonons—magnon-polarons—in antiferromagnets. We first outline a general approach to determining which magnon and phonon modes can ... -
Majorana fermions in spin-orbit-coupled ferromagnetic Josephson junctions
(Journal article; Peer reviewed, 2011)We study all possible Majorana modes in two-dimensional spin-orbit-coupled ferromagnetic superconductor–normal state–superconductor (SNS) Josephson junctions and propose experiments to detect them. With the S region in a ... -
Majorana fermions manifested as interface states in semiconductor hybrid structures
(Journal article; Peer reviewed, 2010)Motivated by recent proposals for the generation of Majorana fermions in semiconducting hybrid structures, we examine possible experimental fingerprints of such excitations. Whereas previous works mainly have focused on ...