Sökning: "Teknisk fysik med inriktning mot materialvetenskap"

Visar resultat 1 - 5 av 47 avhandlingar innehållade orden Teknisk fysik med inriktning mot materialvetenskap.

  1. 1. Nanoscale spin dynamics in ferromagnetic/normal-metal heterostructures for spin-logic application : Engineering of spin-torque efficiency in Co2FeAl/β-Ta and Ru/FeCo/Ru multi-layers

    Författare :Rahul Gupta; Peter Svedlindh; Danny Thonig; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; spintronics; spin pumping; spin dynamics; ferromagnetic resonance; magnetic thin films; heterostructure; spin-logic; spin-mixing conductance; Engineering Science with specialization in Solid State Physics; Teknisk fysik med inriktning mot fasta tillståndets fysik; Teknisk fysik med inriktning mot materialvetenskap; Engineering Science with specialization in Materials Science; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Sammanfattning : In the present information age, people across the globe generate an enormous digital footprint. Therefore, it is necessary to store and process the information in an elegant way. Spin-logic circuits are being considered potential candidates beyond CMOS integrated computing due to high clock speed, non-volatility, and higher logical efficiency. LÄS MER

  2. 2. Towards atomically resolved magnetic measurements in the transmission electron microscope : A study of structure and magnetic moments in thin films

    Författare :Hasan Ali; Klaus Leifer; Peter Van Aken; Uppsala universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Transmission electron microscope; thin films; magnetic moments; electron energy loss spectroscopy; simultaneous acquisition; electron magnetic circular dichroism; Teknisk fysik med inriktning mot materialanalys; Engineering Science with specialization in Materials Analysis;

    Sammanfattning : The magnetic properties of thin metallic films are significantly different from the bulk properties due to the presence of interfaces. The properties shown by such thin films are influenced by the atomic level structure of the films and the interfaces. LÄS MER

  3. 3. Nanocellulose and Polypyrrole Composites for Electrical Energy Storage

    Författare :Gustav Nyström; Maria Strömme; Leif Nyholm; Petr Novák; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; conducting polymer; polypyrrole; cellulose; nanocellulose; porosity; composite; energy storage; battery; supercapacitor; Teknisk fysik med inriktning mot materialvetenskap; Engineering Science with specialization in Materials Science;

    Sammanfattning : To meet the predicted increase in demand for energy storage in tomorrow's society, the development of inexpensive, flexible, lightweight and sustainable energy-storage materials is essential. In this respect, devices based on electroactive organic molecules, such as conducting polymers, are highly interesting. LÄS MER

  4. 4. Nanocomposites for Use in Sliding Electrical Contacts

    Författare :Benny André; Urban Wiklund; Staffan Jacobson; Kenneth Holmberg; Uppsala universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; tribology; materials science; Materialvetenskap; Materials Science; Teknisk fysik med inriktning mot materialvetenskap; Engineering Science with specialization in Materials Science; Teknisk fysik med inriktning mot tribomaterial; Engineering Science with specialization in Tribo Materials;

    Sammanfattning : In this thesis nanocomposite materials for use in high performance electrical contacts are tested. Self mating silver as coatings on cupper substrates are the most used material combination in power connectors today. In this work two new concepts were tested. LÄS MER

  5. 5. A Method for Dispersive Split Hopkinson Pressure Bar Analysis Applied to High Strain Rate Testing of Spruce Wood

    Författare :Svante Widehammar; Karl-Gustav Sundin; Uppsala universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; Materials science; split Hopkinson; wave propagation; dispersion; Hamilton s principle; strain rate; calibration; spruce; wood; Materialvetenskap; Materials science; Teknisk materialvetenskap; teknisk fysik med inriktning mot hållfasthetslära; Technical Physics;

    Sammanfattning : En metod för dispersiv analys av försök med delad hopkinsonstång tillämpad på provning av granved vid hög töjningshastighetSyftet var att etablera en metod för att studera sambandet mellan spänning och töjning för granved vid hög töjningshastighet. Detta åstadkoms genom att anpassa och något vidareutveckla tekniken med delad hopkinsonstång ("Split Hopkinson Pressure Bar", SHPB). LÄS MER