Sökning: "magnetoresistance"

Visar resultat 1 - 5 av 45 avhandlingar innehållade ordet magnetoresistance.

  1. 1. Magnetoresistance and Space : Micro- and Nanofeature Sensors Designed, Manufactured and Evaluated for Space Magnetic Field Investigations

    Författare :Anders Persson; Hugo Nguyen; Greger Thornell; Johan Åkerman; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Tunneling Magnetoresistance; Planar Hall effect; Magnetic tunnel junction; Magnetometer; Materials science; Teknisk materialvetenskap; Engineering physics; Teknisk fysik; Teknisk fysik med inriktning mot mikrosystemteknik; Engineering Science with specialization in Microsystems Technology;

    Sammanfattning : In recent years, the interest for miniaturization of spaceborne instruments and subsystems has increased steadily, as this enables development of small and lightweight satellite classes as well as more versatile payloads on traditional spacecraft. In essence, this thesis work is an investigation of the applicability of magnetoresistive technology to a magnetometer intended for space. LÄS MER

  3. 2. Studies of magnetoresistance and Y substitutions in YBa2Cu3O7-delta high temperature superconductors

    Författare :Magnus Andersson; Östen Rapp; Oystein Fischer; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; high-temperature superconductors; elctrical conductivity; magnetoresistance; measurement systems; YBa2Cu3O7; substitutional effects;

    Sammanfattning : .... LÄS MER

  4. 3. Magnetotransport Studies of Mn Ion-Implanted Nanowires

    Författare :Waldomiro Paschoal; Linnaeus University; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; hopping conduction; ferromagnetism; ion-implantation; Nanowire; GaMnAs; magnetoresistance; Fysicumarkivet A:2014:Paschoal;

    Sammanfattning : This thesis focuses on the magnetotransport properties of highly Mn-doped crystalline GaAs nanowires. The GaAs nanowires were first grown by metal-organic vapor phase epitaxy from gold seed particles, and subsequently implanted with Mn ions under varying conditions, e.g., ion fluence and acceleration voltage. LÄS MER

  5. 4. Magnetotransport Measurements of Ni Thin Films

    Författare :Shawn Alexander Boye; Peter Lazor; Hans Annersten; Per Nordblad; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; magnetoresistance; Hall effect; diamond anvil cell; magnon scattering; band ferromagnetism; nickel; Geovetenskap; Earth sciences; Geovetenskap;

    Sammanfattning : This thesis presents transverse magnetoresistance (MR) and Hall resistivity measurements of nickel thin films at temperatures between 280 and 455 K and pressures up to 6 GPa. An experimental system was developed for conducting precise magnetotransport measurements using the current reversal and van der Pauw techniques in combination with a 10 T superconducting magnet. LÄS MER

  7. 5. Effects of the Spin-Orbit Interaction on Transport and Optical Properties of III-V Semiconductor Quantum Wells

    Författare :Vladimir Froltsov; Matematisk fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; spin-orbit interaction; quantum well; III-V; Raman scattering; magnetoresistance; weak localization; spin distribution; magnetic field; Fysik; Physics; Fysicumarkivet A:2000:Froltsov; Halvledarfysik; Semiconductory physics; semiconductor;

    Sammanfattning : Effects of the intrinsic electron spin-orbit interaction on transport and optical properties of III-V semiconductor quantum wells have been studied theoretically. It is shown that due to crystal anisotropy of this interaction, the weak localization magnetoresistance in a magnetic field parallel to interfaces is very sensitive to the epitaxy growth direction and also to the orientation of the magnetic field with respect to the crystal axes. LÄS MER