Sökning: "Permalloy"

Visar resultat 1 - 5 av 9 uppsatser innehållade ordet Permalloy.

  1. 1. Magnetization dynamics in bistable systems

    Kandidat-uppsats, Uppsala universitet/Materialfysik

    Författare :Sven Backlund; [2023]
    Nyckelord :magnetism; magneto-optics; magnetization dynamics;

    Sammanfattning : The magnetization dynamics in ferromagnetic materials will depend on the specific shape of the system’s energy landscape. In most systems, the energy landscapes can be approximated as paraboloids, resulting in a typical ellipti- cal precession of the magnetization. LÄS MER

  3. 2. Computations of the Perpendicular Magnetic Anisotropy Energy of Permalloy

    Kandidat-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Luca Mikadze; [2022]
    Nyckelord :permalloy; perpendicular magnetic anisotropy; perpendicular magnetic anisotropy energy; magnetocrystalline anisotropy; magnetocrystalline anisotropy energy; thin film; density functional theory;

    Sammanfattning : Magnetic materials have many applications in technology. The magnetic properties of materials are therefore important to catalogue for future use. In this project, the magnetic properties of thin films of permalloy are investigated. LÄS MER

  4. 3. Micromagnetic Study of Current Induced Domain Wall Motion for Spintronic Synapses

    Master-uppsats, Uppsala universitet/Energimaterialens fysik

    Författare :Dimitrios-Petros Petropoulos; [2021]
    Nyckelord :computational physics; micromagnetism; micromagnetic simulations; Mumax3; current induced domain wall motion; domain wall driving; spin current; spin transfer torque; synapse; memristor; Neuromorphic computing; spintronic; brain inspired computing; Permalloy; nanowire; nanostrip; notches;

    Sammanfattning : Neuromorphic computing applications could be made faster and more power efficient by emulating the function of a biological synapse. Non-conventional spintronic devices have been proposed that demonstrate synaptic behavior through domain wall (DW) driving. LÄS MER

  5. 4. Transient Dynamics and Core Tunneling in Vertical Spin-Vortex Pairs

    Master-uppsats, KTH/Nanostrukturfysik

    Författare :Milton Persson; [2019]
    Nyckelord :Spin-vortex; ultra fast vortex dynamics; milli-Kelvin temperatures; macroscopic quantum tunneling; Spinnvirvel; ultrasnabb virveldynamik; milli-Kelvin temperaturer; makroskopisk kvanttunnling;

    Sammanfattning : Spin-vortices in vertically spaced pairs of thin elliptical Permalloy nanoparticles are investigated. The two vortex cores with parallel out-of-plane magnetization exhibit a strong monopole-like attraction through the spacer much thinner than the core length, thus forming a bound core-core pair. LÄS MER

  7. 5. Element-Specific Magnetization Dynamics Using T-MOKE at the HELIOS Laboratory

    Kandidat-uppsats, Uppsala universitet/Molekyl- och kondenserade materiens fysik

    Författare :Fredrik Stångberg Valgeborg; [2016]
    Nyckelord :magnetization dynamics; magnetization; demagnetization; magnetism; element-specific; element-specificity; T-MOKE; MOKE; pump-prob; time-resolved pump-probe; HHG; high-order harmonic generation; overtone generation; HELIOS; magnetiseringsdynamik; magnetisering; avmagnetisering; magnetism; grundämnesspecifik; grundämnesspecificitet; T-MOKE; MOKE; pump-prob; tidsupplöst pump-prob; HHG; övertonsgenerering; HELIOS;

    Sammanfattning : Magnetism is a familiar phenomenon, and is applied in a variety of devices, from simple ones, like compasses, to the more sophisticated magnetic hard disk drives. It is also known that the magnetization of a material can change, for example by heating or by exposure to an external magnetic field. LÄS MER