Sökning: "Mössbauer"

Visar resultat 1 - 5 av 43 avhandlingar innehållade ordet Mössbauer.

  1. 1. Mössbauer spectroscopy : methodology and some applications to magnetic materials

    Författare :Tore Sundqvist; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

  3. 2. Mössbauer spectroscopy under high pressures and temperatures

    Författare :Elke Hålenius; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Mössbauer; high pressure - high temperature; iron; olivine; Geovetenskap; Earth sciences; Geovetenskap; mineralogi; petrologi och tektonik; Mineral Chemistry; Petrology and Tectonics;

    Sammanfattning : Iron plays a very important role in Earth materials. 57Fe- Mössbauer spectroscopy provides valuable information on the oxidation state and the near surrounding of iron atoms in crystal structures. LÄS MER

  4. 3. Mössbauer spectroscopy on selectred magnetic compounds

    Författare :Beata Kalska-Szostko; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Magnetic multilayers; transition metal compounds; Mössbauer spectroscopy; magnetic ordering; crystal structure; Fysik; Physics; Fysik; fysik; Physics;

    Sammanfattning : The applications of magnetic materials are related to their magnetic and crystal structure as well as electronic properties. In this thesis, mainly experimental methods have been focussed on novel materials and bulk materials. LÄS MER

  5. 4. 3d Transition Metals Studied by Mössbauer Spectroscopy

    Författare :Saeed Kamali-Moghaddam; Roger Wäppling; Lennart Häggström; Friedrich Wagner; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Mössbauer Spectroscopy; SQUID Magnetometry; XRD; Layered Structures; Magnetism; Magnetic Superlattices; Nanoparticles; Li-ion Batteries; Brass; Fysik; Physics; Fysik;

    Sammanfattning : Layered crystals with magnetic elements as Co and Fe have been studied. In TlCo2Se2, where Co atoms in one sheet are separated by Tl and Se from the next Co sheet, magnetic interaction within and between the sheets have been studied. LÄS MER

  7. 5. Mössbauer Spectroscopy of Meteoritic and Synthetic Fe-Ni Alloys

    Författare :Yassir Ahmed Mohamed Abdu; Hans Annersten; Tore Ericsson; Johan Linden; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Meteorites; Tetrataenite; Antitaenite; Mössbauer spectroscopy; Mechanical alloying; Fe-Ni alloys; High pressure; Geovetenskap; Earth sciences; Geovetenskap; mineralogi; petrologi och tektonik; Mineral Chemistry; Petrology and Tectonics;

    Sammanfattning : This thesis reports on the results of investigating Fe-containing minerals in meteorites, with focus on Fe-Ni minerals and their magnetic properties, along with some synthetic Fe-Ni analogues. The New Halfa meteorite, which fell in Sudan 1994, has been studied using Mössbauer spectroscopy, X-ray diffraction, and electron microprobe analysis techniques, and classified as an ordinary L-type chondrite of petrologic type 4. LÄS MER