Hae
Aineistot 111-118 / 118
Vortices and artificial defects in high-temperature superconducting thin films: Increasing the critical current densities via optimization of multilayer structures
(Turun yliopisto, 2023-06-29)
This dissertation studies the implications of vortex dynamics in high-temperature superconducting thin films. The combined use of both experimental and computational methods enabled one to draw otherwise unobtainable ...
Studies of oxide-semiconductor and metal-semiconductor interfaces for reducing defect densities
(Turun yliopisto, 2024-01-26)
This thesis presents experimental studies of two fundamental components of electronic devices: an oxide- and metal-semiconductor interface. The importance of these interfaces increases continuously when a device size is ...
Galaxy evolution through the lens of active galactic nuclei, their host galaxies, and environments
(Turun yliopisto, 2024-06-11)
The body of research relayed in this dissertation pertains to investigating the immediate environments of Type I quasars for clues to the formation and evolution of galaxies through observations. The neighboring galaxies ...
Structural and chemical modifications of porous silicon for biomedical applications
(Turun yliopisto, 2024-06-01)
The versatility in properties of porous silicon (PSi) has enabled a broad spectrum of applications, ranging from microelectronics and various types of sensors to its use as a biocompatible material in drug delivery.
Structural ...
High-speed jets downstream of the Earth’s bow shock
(Turun yliopisto, 2024-07-10)
The solar wind is decelerated at the Earth’s bow shock, after which it flows around the magnetosphere in the magnetosheath. Amidst the shocked plasma, faster flows can be often observed. These dynamic pressure enhancements, ...
Cantilever enhanced photoacoustic spectroscopy: The First two decades
(Turun yliopisto, 2024-02-29)
Two decades ago, the first experiments with a novel optical microphone using a small silicon cantilever as its sensing element were conducted at the University of Turku. In retrospect, those experiments revealed the potential ...
Electron acceleration in interplanetary space: Radio signatures and in-situ observations
(Turun yliopisto, 2024-08-07)
Coronal Mass Ejections (CMEs) are large-scale releases of hot plasma, to which the magnetic field is frozen-in. If the CMEs are faster than the local magnetosonic velocity in the solar wind, they create shock waves as they ...
Optimized pinning in high-temperature superconductor thin films
(Turun yliopisto, 2024-08-02)
This doctoral dissertation aims to enhance the critical current density (Jc) of high-temperature superconductors (HTS) based on YBa2Cu3O7−δ (YBCO) to maximize their potential. Achieving high Jc in superconductors involves ...