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 6 of 6 for “"Threshold field"”.
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Acoustic assisted actuation of Ni-Mn-Ga ferromagnetic shape memory alloys
… shown in recent work to exhibit large magnetic field induced strains. The material generally requires a large threshold field (of order 3-4 kOe) to initiate the strain. Thus, the power requirements are large and actuators based on these materials could tend to be large. This thesis reports on …
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Understanding and development of combined acoustic and magnetic actuation of Ni₂MnGa single crystals
… of producing a large (several %) magnetic-field-induced strain (MFIS). FSMAs still have several characteristic shortcomings that may limit their potential applications. A threshold field of 2 to 4 kOe must be overcome to initiate twin boundary motion and a larger field is required to …
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Low-dimensional purple and blue bronzes: Crystal growth, characterization and optical properties
… sliding of the CDW, and the existence of a small-threshold field ET of CDW depinning in this sample. Hysteresis in resistivity, which has been detected in many CDW compounds, has been observed in our measurements and is associated with the instability of the CDW possibly due to the presence of …
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Laser Processed Materials for Advanced Solar Devices
… 1) crystallized a-Si:H thin film as a promising field & thermionic emission candidate, and 2) a novel dark film – black silicon, which can highly absorb lights. And finally, a thermionic emission enhanced renewable energy device is purposed, which also adopt black silicon as the sunlights …
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Self-Assembly of Block Copolymers in External Fields
The influence of external fields on the microdomain structure of block copolymers has been studied. Both surface fields and electric fields have been considered. External electric fields are used to create macroscopically oriented bulk samples. In order to circumvent limitations associated with the …