Sökning: "Fasta tillståndets fysik"
Visar resultat 11 - 15 av 240 avhandlingar innehållade orden Fasta tillståndets fysik.
11. Nanoscale spin dynamics in ferromagnetic/normal-metal heterostructures for spin-logic application : Engineering of spin-torque efficiency in Co2FeAl/β-Ta and Ru/FeCo/Ru multi-layers
Sammanfattning : In the present information age, people across the globe generate an enormous digital footprint. Therefore, it is necessary to store and process the information in an elegant way. Spin-logic circuits are being considered potential candidates beyond CMOS integrated computing due to high clock speed, non-volatility, and higher logical efficiency. LÄS MER
12. Resonant Tunneling in Laterally Confined Quantum Structures
Sammanfattning : In the thesis, three-dimensionally confined resonant tunneling structures were studied experimentally. Two approaches were used for obtaining quantum confinement: gate-defined lateral constriction of double barrier structures, and epitaxial growth of self-assembled quantum dots. LÄS MER
13. Cathodoluminescence studies of III-V epitaxial layers
Sammanfattning : [abstract missing].... LÄS MER
14. The optical properties of automatically darkening welding filters based on liquid crystal technology
Sammanfattning : This thesis addresses the problem of the poor optical angular properties displayed by automatically darkening welding filters that are based on liquid crystal technology. It is shown that by reducing thetwist-angle present in the liquid crystal cell to below that of 90° together with employment of a novel polariser arrangement, an optical shutter design using a double-cell construction is obtained thatpossesses a reduced angular transmittance variation when in the activated phase. LÄS MER
15. New and old materials for permanent magnets based on earth-abundant elements
Sammanfattning : Electrical motors, which find use in e.g. electrical vehicles, require per-manent magnets to function. Comparing ferrite magnets and Nd-based magnets reveals a large difference in their price and performance. LÄS MER