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 11 of 11 for “"resistance noise"”.
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Resistance noise in giant magnetoresistive materials
We have studied resistance noise in a variety of systems exhibiting giant magnetoresistance (GMR) including coupled and uncoupled multilayers, spin-valves and granular systems. Large equilibrium 1/f noise in the resistance of these materials is associated with the GMR effect. One consequence was …
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Mechanical relaxations, spin glasses and 1/f resistance noise
Two experiments related to 1/f resistance noise will be described in this thesis. The first is measurements of the anelastic piezoresistance in thin films of bismuth, niobium and iron to demonstrate a connection between mechanical anelastic relaxations and electrical 1/f noise from the motion of …
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Mechanical relaxations, spin glasses and 1/f resistance noise
Two experiments related to 1/f resistance noise will be described in this thesis. The first is measurements of the anelastic piezoresistance in thin films of bismuth, niobium and iron to demonstrate a connection between mechanical anelastic relaxations and electrical 1/f noise from the motion of …
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Hydrogen concentration and temperature affect the 1/f resistance noise in niobium films
"The 1/f resistance fluctuations of thin Nb films was studied from 60 K to 400 K. The resistance noise came from hydrogen ions and other defects placed in the films during sputtering. Hydrogen ions cause three types of 1/f noise at different temperatures. The noise is related to internal friction …
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Hydrogen concentration and temperature affect the 1/f resistance noise in Nb films
"The 1 /f resistance fluctuations of thin Nb films was studied from 60 K to 400 K. The resistance noise came from hydrogen ions and other defects placed in the films during sputtering. Hydrogen ions cause three types of 1/f noise at different temperatures. The noise is related to internal friction …
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1/F Noise & slow spin dynamics in chromium, chromium alloys, and disordered iron zirconium
1/f resistance noise studies of the spin dynamics in two magnetic systems are described in this thesis. In chromium, 1 If noise was used as a probe to study spin density wave polarization dynamics. Measurements of the noise anisotropy in a high quality single crystal of Cr revealed a temperature …
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Electrical noise study of spin glass dynamics in mesocopic CuMn
The electrical resistance of the archetypal spin glass CuMn is surprisingly sensitive to small changes in the spin configuration. This enhanced sensitivity results from long-range electron quantum interference at low temperatures. Due to this effect, substantial resistance noise is produced by …
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Electrical noise study of spin glass dynamics in mesoscopic copper manganese
The electrical resistance of the archetypal spin glass $\underline{\rm Cu}$Mn is surprisingly sensitive to small changes in the spin configuration. This enhanced sensitivity results from long-range electron quantum interference at low temperatures. Due to this effect, substantial resistance noise …
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Resistance fluctuation spectroscopy and other transport behavior in lanthanum barium copper oxide
… striped phase is expected to include local resistance anisotropy, this has not been observed, and LBCO’s stripe behavior has only been studied by scattering experiments at beamline facilities. In this work, pulsed-laser deposition and microfabrication were used to create small- volume LBCO …
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Low frequency critical current noise and two level system defects in Josephson junctions
… junction is known to exhibit a 1/f low frequency noise. Implemented as a superconducting qubit, this low frequency noise can lead to decoherence. While the 1/f noise has been known to arise from an ensemble of two level systems connected to the tunnel barrier, the precise microscopic nature of …
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Processing and Reliability Assessment of Solder Joint Interconnection for Power Chips
… in power devices and modules are prone to resistance, noise, parasitic oscillations, fatigue and eventual failure. Furthermore, there has been an increase demand for higher power density and better efficiency for power converters. Power semiconductor suppliers have been concentrating on …