Sökning: "Exchange bias"

Visar resultat 11 - 15 av 51 avhandlingar innehållade orden Exchange bias.

  1. 11. Dynamics of Magnetic Molecules under Electrical Control

    Författare :Henning Hammar; Jonas Fransson; Annica M. Black-Schaffer; Alexander Shnirman; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Molecular magnets; Spin dynamics; Non-adiabatic effects; Exchange interaction; Thermoelectricity; Fysik; Physics;

    Sammanfattning : This thesis theoretically studies the dynamics of molecular magnets under electrical control. Molecular magnets are nanoscale magnets that can, e.g., consist of single-molecules or single-atoms. LÄS MER

  3. 12. Markov Regime Switching in Economic Time Series

    Författare :Ulf Erlandsson; Nationalekonomiska institutionen; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Nationalekonomi; ekonometri; ekonomisk teori; ekonomiska system; ekonomisk politik; forecasting; Markov switching; exchange rates; interest rates; business cycle; economic policy; economic systems; economic theory; econometrics; Economics; currency crisis;

    Sammanfattning : This dissertation studies statistical properties and applications of the Markov switching models for economic time series in five separate papers. The two main statistical themes are (i) the task of choosing the number of states to use in the model, and (ii) inference on time-varying transition probabilities. LÄS MER

  4. 13. Fabrication, functionalization and electrical conductance modulation of nanoparticle based molecular electronic Nano-devices

    Författare :Ishtiaq Hassan Wani; KLAUS LEIFER; Silvia Karthäuser; Uppsala universitet; []
    Nyckelord :Molecular electronics; gas sensor; hybrid materials; place exchange; random telegraph signal;

    Sammanfattning : Over the years many techniques have been proposed for the purpose of the formation of electrically conducting metal-molecule-metal junctions. One such technique utilizes gold-nanoparticles (AuNPs) that could assist in contacting small molecules between large gaps. LÄS MER

  5. 14. Probing brain microstructure with multidimensional diffusion MRI: Encoding, interpretation, and the role of exchange

    Författare :Björn Lampinen; Lund Medicinsk strålningsfysik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MRI; Diffusion; Human; Brain; Microstructure; Fysicumarkivet A:2021:Lampinen;

    Sammanfattning : Diffusion MRI (dMRI) is a non-invasive probe of human brain microstructure. It is a long-standing promise to use dMRI for ‘in vivo histology’ and estimate tissue quantities. However, this faces several challenges. First, the microstructure models used for dMRI data are based on assumptions that may cause erroneous interpretations. LÄS MER

  7. 15. Essays on Empirical Macroeconomics

    Författare :Martin W Johansson; Nationalekonomiska institutionen; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; economic systems; economic theory; econometrics; Economics; structural breaks.; output volatility; threshold autoregression; fiscal policy; real exchange rates; Aggregate consumption; economic policy; Nationalekonomi; ekonometri; ekonomisk teori; ekonomiska system; ekonomisk politik;

    Sammanfattning : The first essay reexamines the proposed presence of so-called loss aversion in aggregate consumption. Recent empirical and theoretical studies have suggested, that consumption growth reacts asymmetrically to positive and negative expected income growth. LÄS MER