Doctoral Theses / Doktorsavhandlingar Institutionen för fysik: Recent submissions
Now showing items 21-40 of 66
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Magnetodynamics of pseudo spin valves investigated using co-planar waveguide and spin torque ferromagnetic resonance techniques
(2017-05-17)Nanocontact spin-torque nano-oscillators (NC-STNOs), based on magnetic multilayers, can generate a wide range of highly nonlinear localized and propagating spin wave modes for use in magnonics. In this thesis, we study ... -
Synchronization Phenomena in Spin Torque and Spin Hall Nano-Oscillators
(2017-05-15)Spin-torque oscillators (STOs) belong to a novel class of spintronic devices and exhibit a broad operating frequency and high modulation rates. STOs take advantage of several physical phenomena such as giant magnetoresistance ... -
Microfluidic devices for single-cell and organ-level studies
(2017-03-01)The process of developing and testing drug candidates is a slow and costly endeavor. The mainstream technologies such as bulk 2D cell culture techniques have been proven insufficient to capture the pharmacokinetics and ... -
Multi-photon microscopy enhanced: Exploring annular beams and gold nano-particles for improved imaging
(2016-05-09)Laser scanning multiphoton microscopy (MPM) has emerged as a powerful tool for non-invasive three-dimensional imaging of biological tissue. The localized focal region enables confocality without the use of a physical pinhole ... -
Angular dynamics of small particles in fluids
(2015-11-20)This thesis concerns the angular motion of small particles suspended in fluid flows. A small particle experiences a hydrodynamic torque due to the local fluid velocity, and this torque leads to rotational motion. When ... -
Equilibrium statistics of channel-confined DNA
(2015-09-24)This thesis is devoted to the study of DNA molecules in nanochannels. In the last ten years, a large number of studies have been conducted wherein DNA molecules were confined to channels with a width of about 100 nm. These ... -
Strong-Field Photodetachment of Negative Ions – Orbital Alignment Effects and Tomographic Imaging of Photoelectrons
(2015-09-07)Photoelectron imaging techniques are used to experimentally investigate photodetachment of negative ions in a strong laser-field as well as the orbital alignment dynamics in the residual neutral. Strong-field ... -
Calibration of medical displays
(2015-09-02)Calibration of medical displays is important in order for images to be displayed consistently. A consistent appearance ensures that all images are always perceived in the same way regardless of display device, location and ... -
Spin Torque and Spin Hall Nano-Oscillators with Single Magnetic Layers
(2015-05-07)Spin-torque oscillators (STOs) are capable of producing tunable broadband high-frequency signals within a nanometer-sized region. In this thesis, novel designs for STOs will be discussed; the common theme of these designs ... -
Glycolytic oscillations in individual yeast cells
(2015-01-07)Oscillations in the concentration of yeast glycolytic intermediates have been intensively studied since the 1950s, but these studies have so far been limited to observations of average oscillatory behavior in synchronized ... -
Non-Linear Canonical Methods in Strongly Correlated Electron Systems
(2014-11-14)In this thesis some new ideas to perform the analysis of Strongly Correlated Electronic Systems (SCES) are developed. In particular the use of non-linear canonical transformations is considered thoroughly. Using such ... -
Genetic variation in natural populations: a modeller's perspective
(2014-10-29)Thanks to advances in genome sequencing, empirical patterns of within- and between-species genetic variation are readily available. By studying these patterns much has been learned about the evolutionary histories of ... -
Utbildning för hållbar utveckling från en lärarhorisont: sammanhang, kompetenser och samarbete
(2014-09-12)Education for sustainable development, ESD, seeks to elucidate complex problems and interdisciplinary, holistic and transformative teaching and learning are described as possible approaches. All teachers, regardless of ... -
Transport, Turbulence and Instabilities in Cosmic Magnetic Fields
(2014-09-05)This decade has seen a large number of space missions, which, alongside ground-based radio, optical and gamma-ray telescopes, have enabled a deep insight into the non-thermal astrophysical environments. Interstellar Medium ... -
Strongly non-linear magnetization dynamics in nano-structures: perturbations, multi-mode generation, and topological droplets
(2014-05-12)Spin torque oscillators (STOs) are magnetic nano-devices in which strongly non-linear magnetodynamic phenomena can be excited by current. In this thesis, we study some of these phenomena by means of micromagnetic simulations, ... -
Excited States in Negative Ions
(2014-05-07)This thesis covers experimental studies of atomic negative ions with the main goal of increasing our fundamental understanding of these fragile quantum systems. Comparisons of measurements and calculations have been used ... -
Modeling of radiative processes in organic scintillators
(2014-02-21)This thesis presents the development of a Monte Carlo calibration of a whole body counter (WBC), consisting of four large plastic (organic) scintillators, used for determine the body burden of gamma-emitting radionuclides. ... -
Teacher Change in relation to Professional Development in Entrepreneurial Learning
(2013-12-02)Abstract Compulsory school teachers’ perceptions and change in relation to Continuing Professional Development (CPD) in entrepreneurial learning are investigated in this thesis. The teacher level focus is based on evidence ... -
Periodized Thermal Greens Functions and Applications
(2013-08-30)This work describes a new formalism for Fermionic thermal Greens functions that are discretized in imaginary time. The discretization makes the thermal Greens function periodic in imaginary (Matsubara) frequency space and ... -
Natural science specialising in physics
(2013-08-30)A new class of liquid crystal materials has been recently discovered. These mate- rials are constituting of bent core (BC) molecules. Being initially only of scientific interest, now they attract the interest not only ...