Sökning: "micromagnetic simulations"

Visar resultat 1 - 5 av 18 avhandlingar innehållade orden micromagnetic simulations.

1. 1. Dynamics and Intrinsic Variability of Spintronic Devices

   Författare :Corrado Carlo Maria Capriata; B. Gunnar Malm; Per-Erik Hellström; Dan Kuylenstierna; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Spintronics; micromagnetic simulations; SHNO; MTJ; microwave measurements; realistic simulations; low-temperature measurements; fabrication; grains; Spinntronik; mikromagnetiska simuleringar; SHNO; MTJ; mikrovågsmätningar; realistiska simuleringar; lågtemperaturmätningar; nanotillverkning; korn; Informations- och kommunikationsteknik; Information and Communication Technology;

   Sammanfattning : Spintronics is a scientific domain focusing on utilizing electron spin for information processing. This is the element that distinguishes it from electronics, which only utilizes the charge of electrons. LÄS MER

3. 2. Nonlinear dynamics of strongly-bound magnetic vortex pairs

   Författare :Artem Bondarenko; Vladislav Korenivski; Gleb Kakazei; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; magnetic vortex; nonlinear mechanics; isolated resonance; nonlinear frequency tuning; chaotic dynamics; parametric interaction; Thiele equation; Monte Carlo simulations; Ito processes; bistability; tunneling magneto-resistance; Magnetisk-virvel; icke-linjär dynamik; isolerad resonans; icke-linjär frekvens-optimering; kaotisk dynamik; parametrisk interaktion; Thiele-ekvation; Monte Carlo-simuleringar; Ito-processer; bistabilitet; tunnelmagneto-resistans.; Fysik; Physics;

   Sammanfattning : This work is a study of nonlinear phenomena in vertically stacked pairs of magnetic vortices. New dynamic regimes are uncovered with a decrease in the inter-vortex separation to below the lateral vortex-core size. LÄS MER

4. 3. On Some Properties and Applications of Patterned Ferromagnetic Thin Films

   Författare :Pierre E. Roy; Peter Svedlindh; Per Nordblad; Jeffrey McCord; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; micromagnetics; vortex; spin dynamics; domains; MFM; microwave; patterned; permalloy; Materialvetenskap; Materials science; Teknisk materialvetenskap;

   Sammanfattning : A microwave reflection method has been used to measure the spin excitations corresponding to the translational mode of magnetic vortices in samples containing either one or two vortices. Experimental findings are complemented by micromagnetic simulations. One-vortex systems are investigated in micron-sized circular and elliptical cylinders. LÄS MER

5. 4. Magnetization Dynamics in Nano-Contact Spin Torque Oscillators : Solitonic bullets and propagating spin waves

   Författare :Stefano Bonetti; Johan Åkerman; Thomas Silva; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; magnetism; spintronics; thin magnetic films; spin transfer torque; magnetization dynamics; spin waves; microwave oscillators; giant magneto-resistance; Magnetism; Magnetism;

   Sammanfattning : Magnetization dynamics in nano-contact spin torque oscillators (STOs) is investigated from an experimental and theoretical point of view. The fundamentals of magnetization dynamics due to spin transfer torque are given. A custom-made high frequency (up to 46 GHz) in large magnetic fields (up to 2. LÄS MER

7. 5. Designing order with long-range interactions in mesoscopic magnetic chains

   Författare :Christina Vantaraki; Vassilios Kapaklis; Björgvin Hjörvarsson; Gabriella Andersson; Tapati Sarkar; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; magnetism; mesospins; mesoscopic magnetic chains; magnetic nanostructures; long-range interactions;

   Sammanfattning : This thesis investigates how the low-energy magnetic configuration of a mesoscopic chain can be tuned by geometrical modifications. The magnetic arrays made by single-domain stadium shaped elements positioned side-by-side were fabricated by patterning into a sputtered ferromagnetic thin film. LÄS MER