Sökning: "NiFe"

Visar resultat 1 - 5 av 17 avhandlingar innehållade ordet NiFe.

  1. 1. Fabrication and Characterization of magnetometer for space applications

    Författare :Fatjon Qejvanaj; Johan Åkerman; BRAD ENGEL; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; AMR; Magnetic sensor; Ferromagnetic; Antiferromagnetic; NiFe; IrMn; exchange bias.; Fysik; Physics; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : The present rapid increase in the number of space missions demands a decrease in the cost of satellite equipment, but also requires the development of instruments that have low power consumption, low weight, and small size.Anisotropic magnetoresistance (AMR) sensors can answer these needs on account of their small size, weight, and power consumption. LÄS MER

  3. 2. Novel RF MEMS Devices Enabled by Three-Dimensional Micromachining

    Författare :Umer Shah; Joachim Oberhammer; Raafat Mansour; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Microelectromechanical systems; MEMS; Radio frequency microelectromechanical systems; RF MEMS; Micromachined transmission line; Micromachining; Tuneable capacitor; Switched capacitor; Coupled-line coupler; Tuneable directional coupler; Intermodulation distortion; MEMS varactor; Two-tone IIP3 measurement; Passive components and circuits; Reliability; Magnetic materials; NiFe multilayer composite; Permeability; Permittivity; Micromachined inductors;

    Sammanfattning : This thesis presents novel radio frequency microelectromechanical (RF MEMS) circuits based on the three-dimensional (3-D) micromachined coplanar transmission lines whose geometry is re-configured by integrated microelectromechanical actuators. Two types of novel RF MEMS devices are proposed. LÄS MER

  4. 3. Magnetic Thin Films with Graded and Tilted Anisotropy for Spintronic Devices

    Författare :Yeyu Fang; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : In this thesis magnetic thin films with graded or tilted anisotropy are intensively studied for potential applications in spintronic devices. A continuum of stable remanent resistance states is realized in Co/Pd multilayers based on a perpendicularly magnetized pseudo spin valve (PSV). LÄS MER

  5. 4. Reaction mechanism of metalloenzymes studied by theoretical methods

    Författare :Geng Dong; Beräkningskemi; []
    Nyckelord :Metalloenzymes; Reaction mechanism; QM MM; DFT; DMRG; CAS-srDFT; Big-QM; QTCP;

    Sammanfattning : Metalloenzymes catalyse a wide variety of reactions in nature. In the thesis, I have studied the reaction mechanism of three metalloenzymes, viz. LÄS MER

  7. 5. Linear, Non-Linear, and Synchronizing Spin Wave Modes in Spin Hall Nano-Oscillators

    Författare :Hamid Mazraati; Johan Åkerman; Dario Arena; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; spin Hall effect; spin Hall nano-oscillators; threshold current; microwave; spin wave; synchronization; Fysik; Physics;

    Sammanfattning : Spin Hall nano-oscillators (SHNOs) are nanoscale spintronic devices that generate microwave signals with highly tunable frequency. This thesis focuses on improving the signal quality of nanoconstriction-based SHNOs and also on developing a better understanding of their magnetization dynamics. LÄS MER