Sökning: "thermal transitions"
Visar resultat 16 - 20 av 73 avhandlingar innehållade orden thermal transitions.
16. Type-II interband quantum dot photodetectors
Sammanfattning : Photon detectors based on single-crystalline materials are of great interest for high performance imaging applications due to their low noise and fast response. The major detector materials for sensing in the long-wavelength infrared (LWIR) band (8-14 µm) are currently HgCdTe (MCT) and AlGaAs/GaAs quantum wells (QW) used in intraband-based quantum-well infrared photodetectors (QWIPs). LÄS MER
17. Properties in New Complex Perovskite-Related Materials, a Matter of Composition and Structure
Sammanfattning : This PhD thesis presents investigations of perovskite-related compounds in systems of interest for applications in components in solid oxide fuel cells. The compound compositions derive from substitutions in the parent compounds LaCoO3, LaCrO3 and SrFeO3. LÄS MER
18. The Influence of Interlayer Exchange Coupling on Magnetic Ordering in Fe-based Heterostructures
Sammanfattning : Temperature dependent magnetization measurements were conducted on Fe-based heterostructures. A linear increase of the magnetic critical temperature with increasing Fe thickness was found for Fe/V superlattices with strong interlayer exchange coupling. LÄS MER
19. Thermal residual stresses, hardness and microstructural characterisation of functionally graded WC-Co composites
Sammanfattning : Functionally graded materials (FGMs) incorporate gradual transitions in their microstructure and/or composition with distance. The gradients provide means to favourably engineer their thermomechanical properties by changing e.g., the local modulus, yield strength, state of residual stress etc. LÄS MER
20. Time-Resolved X-ray Diffraction Studies of Laser-Induced Dynamics in Solids
Sammanfattning : X-ray diffraction is an invaluable tool in the field of structural dynamics. In the work described in this thesis, time-resolved X-ray diffraction experiments were carried out to investigate ultrafast lattice dynamics. LÄS MER