Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 30 for “"magnetic thin films"”.
-
Magnetic thin films For spintronic memory
… of spatially non-uniform magnetizations in magnetic materials. They form the boundaries between two or more uniformly magnetized regions called domains. Skyrmions are circular magnetic domains with chiral domain walls that are interesting due to their stability and potential for fast motion. …
-
Magnon Transport in Insulating Magnetic Thin Films
Magnon-mediated spin flow in magnetically ordered insulators enables long-distance spin-based information transport with low dissipation. MAFO (MgAl0.5Fe1.5O4) is a spinel ferrite that has been recently stabilized in epitaxial thin-film form and has a substantial in-plane four-fold magnetic …
-
Nanostructuring magnetic thin films using interference lithography
… for advanced data storage technology. Patterned magnetic media and magneto-resistive random-access memory (MRAM) can potentially fulfill this need. The technique of interference lithography is examined in the context of patterning ~100 nm size features. An interferometer is designed and built …
-
Scanning probe investigations of magnetic thin films and nanostructures
Magnetic thin films and nanostructures, like nanoparticles and molecules, have unique transport properties considering their ability to eject spin polar-ised currents. In this work, the possibilities to make these properties accessi-ble by means of scanning probe microscopy have been investigated. …
-
A Biaxial Magneto-optical Kerr Magnetometer for Studying Magnetic Thin Films
… magneto-optical Kerr magnetometer to study thin magnetic films. The design enables researchers to measure perpendicular and in-plane hysteresis curves of ultra thin films down to a thickness of 9 A. The optical components are fastened to a vibration isolation table and the sample is …
-
Grazing Incidence X-ray Scattering from Magnetic Thin Films and Nanostructures
… has been used to characterize the structure of magnetic thin films and periodic nanostructures. The combined metal and metal oxide films have been chosen to clarify the effects of growth processing techniques in technologically important magnetic and magnetoresistive thin film materials, and …
-
Optimization of magnetic thin films for generating stable chiral magnetic structures
… stability, low energy and low current in magnetic devices make them attractive for memory storage, sensors and computing. Their effectiveness is limited by the current, density, and device size, which can be optimized by tuning the magnetic materials properties. In this thesis, we show the …
-
Magnetic behavior of 360° domain walls in patterned magnetic thin films
… both by simulation and experimentally through magnetic force microscopy and scanning electron microscopy with polarization analysis. Next, a model multilayer system is used to demonstrate the magnetostatic behavior of 360DWs, demonstrating a much reduced stray field compared to 180DWs and a …
-
Fundamentals, Voltage Control and Novel Application of Exchange Bias in Magnetic Thin Films
… which aims to utilize the electron's spin in magnetic thin films for data storage and manipulation, is a promising alternative. Among the rich physical interactions that appear in magnetic thin films, the exchange-bias (EB) effect is essential for many spintronic devices. EB is an effect that …
-
Nonlinear spin waves in magnetic thin films - foldover, dispersive shock waves, and spin pumping
… made use of a system that consisted of a YIG thin film strip, which supported the propagation of forward volume spin waves, and a microwave amplifier, which amplified the signal from the output of the YIG strip and then fed it back to the input of the strip. The signal amplitude vs. frequency …
-
Microstruture & High Frequency Property of Fe- & Co- Based Nano-Grain Thin Films
Magnetic thin films are widely used in various fields of high-speed electronics and microwave devices. In order to apply magnetic thin films at high frequency range, it is essential to measure the high frequency permeability and understand the electromagnetic properties that can control the high …
-
Interaction of stress and magnetic properties in patterned copper-nickel-copper thin films
In recent years, the epitaxial Cu/Ni/Cu thin film system has been extensively studied, due to its wide range of perpendicular magnetization. It has proved to be a model system to explore the interactions of strain, surface energies and magnetic properties. For that reason, is also an ideal system …
-
Superconducting Proximity Effects and Josephson Coupling in CoFeB Structures
… results that assess the suitability of a ferromagnetic cobalt-iron-boron alloy (CoFeB) for further research and application in ‘superconducting spintronics’ - the field that aims to utilise the distinct physics arising at interfaces between superconducting and magnetic thin films for the …
-
Atomistic Study of Traveling Skyrmions in Multi-Sublattice Magnetic Materials
… novel material systems, and one such avenue is magnetic thin films. Bits of information can be encoded by magnetic twisted textures called skyrmions, which can be efficiently driven by applying electrical current. Recently, emphasis has been placed on investigating antiferromagnetic and …
-
Magnetic assisted statistical assembly
… of this thesis is to develop a process using magnetic forces to assemble micro-components into recesses on silicon based integrated circuits. Patterned SmCo magnetic thin films at the bottom of recesses are used to provide forces to orient, align and retain micro-devices on silicon. The …
-
Magnetic domain walls driven by interfacial phenomena
A domain wall in a ferromagnetic material is a boundary between differently magnetized regions, and its motion provides a convenient scheme to control the magnetization state of the material. Domain walls can be confined and moved along nanostrips of magnetic thin films, which are proposed …
-
High Anisotropy Magnetic Materials for Data Storage and Spintronic Memory
Data storage technologies that utilize magnetic materials for storage are key for both increasing areal density of storage in traditional hard disk media and providing low energy alternatives to traditional CMOS technology through spintronic memory and logic devices. Spintronic memory relies on the …
-
Observation and characterisation of magnetisation ripple using Lorentz transmission electron microscopy
… technique when investigating in-situ micromagnetic behaviour of magnetic thin films. The nano-scale visualisation of the magnetic structure allows for not only the mapping of hysteresis behaviour, but quantitative characterisation of the materials micromagnetic properties. In this thesis, …
Page 1 of 2