Search for dissertations about: "Electrophysics"

Showing result 6 - 10 of 13 swedish dissertations containing the word Electrophysics.

2. 6. Electronic materials : growth and characterisation

   Author : Michael A. Grishin; Ulf O. Karlsson; Massimo Sancrotti; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrophysics; Photoemission; Ultra-short laser pulse; Thin film; Laser deposition; InSb; InAs; GaSb; Ferroelectrics; Elektrofysik; Electrophysics; Elektrofysik;

   Abstract : In this thesis the InSb(111), InAs(111) and GaSb(001) surfaces have been studied by means of time- and angle-resolved photoemission spectroscopy based upon the femtosecond laser system. The pump-and-probe technique allows to analyse both electron states in the valence band and normally unpopulated electron states above the valence band, which can be occupied by transiently excited carriers at the optically pumped surface. READ MORE

4. 7. CONTRIBUTION TO QUANTITATIVE MICROWAVE IMAGING TECHNIQUES FOR BIOMEDICAL APPLICATIONS

   Author : Tommy Henriksson; Ylva Bäcklund; Magnus Otterskog; Hans Sköld; Jean-Charles Bolomey; Nadine Joachimowicz; Alain Joisel; Paul M. Meaney; Christian Pichot; Mälardalens högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Quantitative Microwave Imaging. Inverse Problems; Nonliear Inverse Scattering; Diffraction Tomography; Breast Tumor Detection; Biomedical Imaging; Mammography; Calibration; Modeling; Planar 2.45 GHz Microwave Camera; Robot-based flexible multi-frequency data acquisition; Electrophysics; Elektrofysik; Elektronik; Electronics;

   Abstract : This dissertation presents a contribution to quantitative microwave imaging for breast tumor detection. The study made in the frame of a joint supervision Ph.D. thesis between University Paris-SUD 11 (France) and Mälardalen University (Sweden), has been conducted through two experimental microwave imaging setups, the existing 2. READ MORE

5. 8. Micromachined epitaxial colossal mognetoresistors for uncooled infrared bolometer

   Author : Joo-Hyung Kim; Alexander M. Grishin; Yael Nemirosky; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; La0.67 Sr; Ca 0.33MnO3 LSCMO ; La0.67Sr0.33MnO3 LSMO ; Electrophysics; Elektrofysik;

   Abstract : High quality perovskite manganites, La1-xAxMnO3 (A = Ca, Sr, Ba) are very attractive materials due to their great application potential for magnetic memory, uncooled infrared (IR) microbolometer and spintronics devices. This thesis presents studies of the growth and material characterization (including structural, electrical, magnetic and noise) of epitaxial manganite films on Si and GaAs. READ MORE

6. 9. Electromagnetic Waves in Media with Ferromagnetic Losses

   Author : Jörgen Ramprecht; Martin Norgren; Constantin Simovski; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrophysics; Elektrofysik;

   Abstract : The operation of a wide variety of applications in today's modern society are heavily dependent on the magnetic properties of ferromagnetic materials and their interaction with electromagnetic fields. The understanding of these interactions and the associated loss mechanisms is therefore crucial for the improvement and future development of such applications. READ MORE

7. 10. New Perspectives on Solar Wind-Magnetosphere Coupling

   Author : Torbjörn Sundberg; Lars Blomberg; Judy Cumnock; Masaki Fujimoto; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; magnetosphere; ionosphere; mercury; kelvin-helmholtz; Electrophysics; Elektrofysik;

   Abstract : The streaming plasma in the solar wind is a never ending source of energy, plasma, and momentum for planetary magnetospheres, and it continuously drives large-scale plasma convection systems in our magnetosphere and over our polar ionosphere. This coupling between the solar wind and the magnetosphere is primarily explained by two different processes: magnetic reconnection at high latitudes, which interconnects the interplanetary magnetic field (IMF) with the planetary dipole field, and low-latitude dynamos such as viscous interaction, where the streaming plasma in the solar wind may trigger waves and instabilities at the flanks of the magnetosphere, and thereby allow solar wind plasma to enter into the system. READ MORE