Sökning: "Spintronic"

Visar resultat 1 - 5 av 27 avhandlingar innehållade ordet Spintronic.

  1. 1. Spin Transport in Two-Dimensional Material Heterostructures

    Författare :André Dankert; Chalmers University of Technology; []
    Nyckelord :Black phosphorous; Topological insulator; h-BN; Silicon; Transistor; Spintronic; MoS2; Graphene; 2D materials; Spin polarized tunnelling; Schottky barrier;

    Sammanfattning : Spintronics is considered as an alternative for information processing beyond the charge based technology. The spintronic device performance depend on the spin relaxation mechanisms in the channel material. Si and graphene are interesting for their long spin coherence lengths and ideal for spin transport channels. LÄS MER

  2. 2. Spin momentum transfer effects for spintronic device applications

    Författare :Yan Zhou; Johan Åkerman; Daniel E. Bürgler; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Spin Torque Oscillator; Giant Magnetoresistance; Tunneling Magnetoresistance; Magnetism; Magnetism;

    Sammanfattning : The recent discovery that a spin-polarized current can exert a large torque on a ferromagnet, through direct transfer of spin angular momentum, offers the possibility of electrical current controlled manipulation of magnetic moment in nanoscale magnetic device structures. This so-called spin torque effect holds great promise for two applications, namely, spin torque oscillators (STOs) for wireless communication and radar communication, and spin transfer torque RAM (STT-RAM) for data/information storage. LÄS MER

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

    Författare :Yeyu Fang; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :;

    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

  4. 4. Gilbert damping of doped permalloy from first principles calculations

    Författare :Fan Pan; Lars Bergqvist; Peter Svedlindh; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Gilbert damping; DFT; Permalloy; SPR-KKR; Spin stiffness; Physics; Fysik;

    Sammanfattning : The dynamic process of how fast a spintronic device can be switched from one state to another is characterized by the Gilbert damping parameter. It has been found that the Gilbert damping along with other intrinsic properties in permalloy, can be tuned by different dopants and doping concentration. LÄS MER

  5. 5. Ion Tracks for Micro- and Nanofabrication : From Single Channels to Superhydrophobic Surfaces

    Författare :Reimar Spohr; Lars Westerberg; Lars Montelius; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; Ion track; single ion; real time; phase detection; conductometric cell; conductometry; electro replication; microtechnology; nanotechnology; surfactant; self organization; GMR; magnetic; sensor technology; hydrophobic; tilted texture.; Physics; Fysik; Materialvetenskap; Materials Science;

    Sammanfattning : A method is described for preset-count irradiations between 1 and 100 ions singling-out individual ions from an ion beam with more than a billion ions arriving per second. The ion tracks are etched in a conductometric system with real-time evaluation of the acquired data. The etch process can be interrupted when reaching a preset channel diameter. LÄS MER