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 18 of 18 for “"Magnetic interaction"”.
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Magnetic interaction of super-Earths with their host star and planet composition
We study the magnetic field and the planet-star interactions of super Earths, extrasolar planets with masses between 1 and 10 times the mass of the Earth. We first present a model of the magnetic field of a super Earth, the dynamo model. We then list and explain several mechanisms through which …
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Interacting Elementary Excitations in Ultrarelativistic Plasmas: Damping Mechanisms and Plasma Thermodynamics
… elementary excitations in quark-gluon and electromagnetic plasmas. Due to Debye screening and Landau damping mechanisms, the interaction fields fall off at large distances, except for static magnetic and color-magnetic fields. The lack of screening of the magnetic interaction leads to a …
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Interaction elementary excitations in ultrarelativistic plasmas: damping mechanisms and plasma thermodynamics
… elementary excitations in quark-gluon and electromagnetic plasmas. Due to Debye screening and Landau damping mechanisms, the interaction fields fall off at large distances, except for static magnetic and color-magnetic fields. The lack of screening of the magnetic interaction leads to a …
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Experimental validation of the predicted emergent magnetism in diamagnetic cadmium sulfide (Cds) doped with boron
… of free carrier concentration and thereby magnetic interaction in dilute magnetic semiconductors. CdS is a wide band-gap semiconductor that displays large and persistent photoconductivity and is predicted to become magnetic when doped with certain dopants such as Boron[1]. In this work, we …
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Brillouin scattering investigation of nanomagnetic structures
… dynamical properties of arrays of vertical ferromagnetic nanowires and nanorings, which show great promise as high-density magnetic storage and sensor devices. Three closely related projects are reported: (1) observation of bulk magnon quantization in Ni nanowires: bulk spin wave quantization has …
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Mössbauer studies of putidaredoxin
… of a pure quadrupole doublet, and the absence of magnetic interaction indicates that the electrons on the two iron atoms are coupled to a total spin of zero. The reduced state contains one additional electron which is shared between the two iron atoms and produces an internal field in excess of …
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Self assembling magnetic tiles
… focus of the thesis was to improve the design of magnetic tile self assembly. By constructing a flexible chain embedded with permanent magnets, self assembly is achieved through magnetic interaction. Theory has shown that such a chain is capable of self assembling into any 3D shape without …
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Elastic and inelastic dipolar scattering
… Most of those emerging phenomena arise from interactions. The strength of the interactions is an essential parameter for a quantum gas experiment. If the interactions are too weak or lead to rapid losses, the experiment cannot succeed. The dipolar interaction has many features making it …
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Coexistence and Competition of Superconductivity and Magnetism
… Fermi surface and the relative strength of the magnetic interaction. The introduction of an anomolous term in the free energy leads to a new phase which consists of a constant superconducting order parameter and an antiferromagnetic spin-wave with a shifted wave-vector. The possibility of …
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Manipulative Scanning Tunneling Microscopy and Molecular Spintronics
… as a versatile tool for studying nanoscale interactions due to its capabilities of local measurement of spectroscopic, magneto-electric, and topographic properties in real-space with sub-nanometer resolution. Still, many physical and chemical effects have yet to be completely characterized …
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Mechanics of magneto-active polymers
… are polymer-based composites that respond to magnetic fields with large deformation or tunable mechanical properties. While a variety of these materials exist, most are composites of a soft polymer matrix with a filler of magnetic particles. The multi-physics interactions in MAPs give them two …
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Magnetorheological fluids for extreme environments : stronger, lighter, hotter
… for the fluid such as generating large magnetically induced shift in rheological properties with tolerance to elevated temperatures and low fluid density in order to maintain manageable hydrostatic downhole pressures. In this thesis we investigate a number of these fluid design …
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Magnetism and interactions within the single domain limit: reversal, logic and information storage
Magnetism and magnetic material research on mesoscopic length scale, especially on the size-dependent scaling laws have drawn much attention. From a scientific point of view, magnetic phenomena would vary dramatically as a function of length, corresponding to the multi-single magnetic domain …
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Particulate dispersions for magnetic recording data
The study of a magnetic recording media dispersion has been carried out using hindered settling analysis, the purpose of which was to probe the equilibrium state structure in zero applied magnetic field. The system chosen for the main study was based on a commercial formulation of a y-Fe 203 …
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Design of functional colloidal magnetic nanoparticles for biomedical applications
… fields have shown to be realistic. The interaction of magnetic nanoparticles with applied magnetic field gradients makes these particles attractive for their potential applications in biomedical imaging, diagnostic, and therapy. In this context, a great advantage are the …
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Superstructures of Magnetic Materials
… reports on the results of studies on magnetic materials as the ternary carbide SmNiC2 and the perovskite-related layered compounds La5(Ti0.80Fe0.20)5O17 and La6(Ti0.67Fe0.33)6O20. Studies were performed with single-crystal X-ray diffraction and subsequently refinement and analysis of …
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Theory of magnetic transition metal nanoclusters on surfaces
… and led to the development of the field of magnetic nanostructures. This research has been fueled by the technological potential of these systems for the field of high-density magnetic storage media and has been accelerated by the many novel experimental methods and techniques developed …
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Electric field effect on magnetic interface phenomena
L'abstract è presente nell'allegato / the abstract is in the attachment