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.
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Showing 1 to 20 of 8174 for “"magnetic"”.
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Developing Magnetic Tweezers for Magnetic Material Manipulation
… materials. Among current available methods, the magnetic tweezers show high efficiency and cost effectiveness in generating strong and direction adjustable interactions with magnetic materials. Since our research group has extensive experience in synthesizing magnetic nanostructures, it is of …
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New models of magnetic interactions for bound magnetic polarons in dilute magnetic semiconductors
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 1990
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Magnetic Images & A Novel Stable Ferro-Magnetic Suspension
… for their spectacular demonstrations of diamagnetically levitated living animals. My MS research is an investigation to develop a novel magnetic suspension capable of operating under ambient conditions without any cryogenics. The physical problem is to freely suspended an object, the proof …
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Magnetic properties of lithographically patterned thin film magnetic elements for magnetic random access memory applications
… With the aim of assessing the behavior of future magnetic random access memory (MRAM) devices, the magnetic properties of the patterned elements, including magnetization switching mechanisms, switching field distribution, magnetic thermal stability, and magnetostatic interactions, have been …
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Magnetic Characterisation of Nanostructured Magnetic Systems Using SQUID Magnetometry
… main characterisation tool to investigate the magnetic behaviour of a number of materials on the bulk, nano- and atomic scale. In particular magnetic characterization was conducted on a selection of doped lanthanum manganate (LMO)magnetic nanoparticles (MNPs), a family of lanthanide ionic …
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Magnetic properties measurement of new magnetic material : SOMALOY 700 (5P)
… and more comfortable way. Presently, electromagnetic technology is improving day by day and most of the current electrical machines require the magnetic cores to operate at higher frequency to meet the demand of high–speed performance in catching up the aggressive technological evolution. On …
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Magnetic structure in manganites as probed by magnetic force microscopy
This dissertation describes the use of magnetic force microscopy to directly measure the magnetic structure of a sample on a microscopic level. Our magnetic force microscope has been operated at temperatures ranging from 293 to 4.3 K and fields ranging from 0 to 3 T, providing a method for imaging …
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An HBT magnetic sensor with integrated 3-dimensional magnetic structures
… functionality. This thesis describes a work on magnetic field sensors based on an InP/InGaAs heterojunction bipolar transistor (HBT) which has been fabricated to be compatible with high frequency epilayer structure and processes. In this work, the complete fabrication process for the HBT …
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Magnetic surface relaxation and reconstruction phenomena in frustrated magnetic systems
… magnets do, however, and we consider two cases: Magnetic relaxation and the more unusual magnetic reconstruction phenomenon. Magnetic relaxation involves the extinction near the surface of a magnetic order that is present in the bulk and exists as a type of magnetic domain wall. Calculations of …
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Upper critical magnetic field of superconducting films with magnetic impurities
We have measured the upper critical magnetic field, H(T), of c2 In-Mn and Pb-Mn alloy films. Hc2 was determined from the resistance of the films. The results were compared with the theory of Fulde and MakL This theory assumes that the electron-phonon coupling is weak, and that the interaction …
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Magnetic fluid flow phenomena in DC and rotating magnetic fields
An investigation of magnetic fluid experiments and analysis is presented in three parts: a study of magnetic field induced torques in magnetorheological fluids, a characterization and quantitative measurement of properties relating to the transition of a ferrofluid drop from a continuous phase into …
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On the dynamics of magnetic fluids in magnetic resonance imaging
The hydrodynamics of magnetic fluids, often termed ferrofluids, has been an active area of research since the mid 1960s. However, it is only in the past twenty years that these fluids have begun to be used in magnetic resonance imaging (MRI) where they have found application as contrast agents, …
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Magnetic resonance microscopy
… in the reconstruction of 4D spectral-spatial magnetic resonance imaging (MRI) data. The algorithm uses n-1 successive stages of 2D filtered backprojection to reconstruct an nD image. This approach results in a reduction in computational time on the order of Nn-2 relative to the single stage …
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Metallic Magnetic Hetrostructures
… structures. In SV layered structures, two ferromagnetic layers are separated by a non-magnetic spacer. Under an external magnetic field, the relative orientation of the magnetization changes in the ferromagnets, exhibiting the giant magnetoresistive effect. The controlled switching of …
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A magnetic accelerator
Thesis (B.S.) Massachusetts Institute of Technology. Dept. of Electrical Engineering, 1957.
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Magnetic forming processes
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1963.
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Stirling-magnetic cryocooler
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Magnetic Microstructure and Actuation Dynamics of NiMnGa Magnetic Shape Memory Materials
Magnetic shape memory (MSM) materials are a new class of smart materials which exhibit shape deformation under the influence of an external magnetic field. They are interesting for various types of applications, including actuators, displacement/force sensors, and motion dampers. Due to the huge …
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Magnetic iron oxide nanoparticles: synthesis, characteristics, magnetic behavior, and biomedical applications
Magnetic iron oxide nanoparticles are attracting increasing attention due to their interesting properties that can be applied in a great number of applications such as catalysis and biomedicine. This thesis focuses on the synthesis, characteristics, and biomedical applications of iron oxide …
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