Search for dissertations about: "magnetic fluctuations"

Showing result 1 - 5 of 84 swedish dissertations containing the words magnetic fluctuations.

2. 1. Intrinsic tunneling spectroscopy of low-Tc cuprate superconductors : Pseudogap, fluctuations and electrical doping

   Author : Thorsten Jacobs; Vladimir M. Krasnov; Magnus Andersson; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Bi-2201; Bi-2212; low-Tc; cuprates; intrinsic tunneling; transport measurements; pseudogap; fluctuations; electrical doping; Physics; fysik;

   Abstract : In this thesis, intrinsic tunneling and magnetic transport measurements of the cuprate superconductor Bi2+xSr2-yCuO6+δ (Bi-2201) are presented. The compound is characterized by a single-CuO2 plane, has a very low critical temperature Tc ~ 4K and a relatively low upper critical field Hc2 ~ 10T. READ MORE

4. 2. Fluctuations and transport in tokamaks and extensions of neoclassical transport

   Author : Thomas Edwin Stringer; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; magnetic fluctuations; Anomalous transport; neoclassical transport; electrostatic fluctuations; Subatomic physics;

   Abstract : .... READ MORE

5. 3. Effects of Spin-Orbit Interactions in Ferromagnetic Metal Nanoparticles

   Author : Aleksander Cehovin; Matematisk fysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; electrical; magnetic and optical properties; elementary spin excitations; spektroskopi; magnetisk resonans; supraledare; electron tunneling spectroscopy; Condensed matter:electronic structure; magnetic anisotropy; spin-orbit interactions; magnetism in nanostructures; egenskaper elektriska; ferromagnetic materials; magnetiska och optiska ; Kondenserade materiens egenskaper:elektronstruktur; relaxation; spectroscopy; supraconductors; magnetic resonance; Fysicumarkivet A:2003:Cehovin;

   Abstract : This thesis is a theoretical investigation of the effects of spin-orbit (SO) interactions in ferromagnetic metal nano-particles. Part I of the thesis is devoted to an elementary introduction of the research field, including recent experimental advances which partly motivated the work presented here. READ MORE

6. 4. Stochastic Resonance and Noise-Assisted Signal Transfer : On Coupling Effects of Stochastic Resonators and Spectral Optimization of Fluctuations in Random Network Switches

   Author : Peter Hammerstein; Claes Granqvist; Laszlo Kish; Hans Liljenström; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering physics; stochastic resonance; nonlinear stochastic dynamics; noise and fluctuations; magnetic domains; Teknisk fysik; Engineering physics; Teknisk fysik;

   Abstract : Recent research shows that noise or random fluctuations must not always be destructive in Nature by degrading system performance. On the contrary, in nonlinear systems they can synchronize systems or enhance the quality of signal transmission. The latter possibility is reported in the thesis. READ MORE

7. 5. Topological Phase Transitions in Magnetic Nanostructures of Dirac Materials

   Author : Nezhat Pournaghavi; Carlo M. Canali; Michael Flatté; Linnéuniversitetet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Topological insulators; Magnetic materials; Quantum anomalous Hall effect; Topological magneto electric effect; Dirac semimetals; Weyl semimetals; Condensed Matter Physics; Kondenserade materians fysik;

   Abstract : Over the past two decades, the discovery of topological Dirac materials, such as topological insulators and semimetals, has defined a new paradigm in condensed matter physics and established new platforms for realizing spin electronic devices and quantum computing. The novel quantum properties of these materials, which are mainly due to the presence of strong spin-orbit coupling, are invariant under topological transformations, making them more resilient to structural disorder, electromagnetic and thermal fluctuations in comparison to the conventional silicon-based materials. READ MORE