Download or read book Superconducting Properties of Niobium Films written by Wayne R. Hudson and published by . This book was released on 1971 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural and Superconducting Properties of Sputter deposited Niobium Films for Applications in RF Accelerating Cavities written by Michael Alexander Peck and published by . This book was released on 1999 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Structure and Electrical and Superconducting Properties of Niobium Nitride Thin Films written by Ying Ming Shy and published by . This book was released on 1970 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Properties of Superconducting Niobium Films Made by protected Sputtering written by Charles John Kircher and published by . This book was released on 1963 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thin Film Multilayer Superconductors and the Proximity Effect written by Kevin M. McLaughlin and published by . This book was released on 1999 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent superconducting thin films studies have attempted to create pure metal layer films of Niobium and Titanium with the same properties of superconducting NbTi wire used in industry. These studies have all reported depression of the superconducting properties of the pure metal films which has been attributed to the proximity effect. The purpose of this research project was to construct several NbTi films composed of alloyed layers to overcome the proximity depression of superconducting properties. These films are unique in that they are the only films with both alloyed Nb/Ti superconducting and normal layers reported in the literature. Films with several different compositions and bilayer geometries were designed, constructed and their superconducting properties characterized. The films were created by the RF sputtering of alloyed targets at ambient temperatures. Characterization of the composition of the films was performed by microprobe analysis at two different electron beam voltages. A simulation of the electron beam excitation volume of the microprobe was performed to determine the difference in the two analyses and to determine whether the substrate would be found upon microprobe examination. X-ray diffraction was utilized to determine the bilayer spacing and to give a qualitative understanding of the alignment of the film microstructures. The critical temperature and upper critical magnetic field were measured to determine the superconducting properties and the extent of the proximity effect in the films. The microprobe analysis found most films to be very pure alloys except for films 6001, 6002, 6003(1) in which there were between 1-8 wt% of impurities. All films contained compositional variations on the order of 10 wt% from the design values. X-ray diffraction indicated agreement with the designed bilayer spacing in all films but 6003(2), 6005(1), and 6005(2) which had bilayer periods larger than originally designed. The proximity effect was not observed in any of the film's superconducting properties examined. T[subscript]c and H[subscript]c2 properties for the films without impurities had properties equal to that of bulk Nb/47wt% Ti. Films 6001, 6003(1) had depressed T[subscript]c and H[subscript]c2 values which were attributed to their impurity contamination. The low Ti composition in many of the films points to the inaccuracy of the deposition parameters when the films were first processed. The lack of T[subscript]c and H[subscript]c2 depression normally seen in other film studies with bilayer periods between 10-30 nm demonstrates that alloyed layers should be used to overcome the proximity effect in multilayer thin film superconductor studies. Overcoming the proximity effect should translate into a better understanding of flux pinning mechanisms in the material and increased superconducting critical currents in these films.
Download or read book Superconducting Properties of Ultrathin Nb and V Films written by Sung Il Park and published by . This book was released on 1986 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sputtered NB TA Multilayers written by Phillip Roy Broussard and published by . This book was released on 1986 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Highly correlated Electron Behavior in Niobium and Niobium Compound Thin Films written by Melissa Rose Beebe and published by . This book was released on 2017 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electron correlations are the root of many interesting phenomena in materials, including phase transitions such as superconductivity and insulator-to-metal transitions, which are of great interest both for scientific understanding and for many applications. Such phase transitions can often be tailored in thin films, in which the geometry of the material is limited in one dimension. By studying how the physical structure of a thin film affects its correlated electron response, it is possible to obtain useful insight into both the nature of the electron correlations present in the material and how to control them for various applications. Niobium, an elemental superconductor, has the highest critical temperature and lower critical field of the naturally-occurring superconductors, making it attractive for many applications, particularly in the superconducting radio frequency (SRF) community. Several niobium-based compounds are also superconductors of interest; while the bulk materials are fairly well-understood, there is still a great deal to learn regarding the effects of the microstructure of thin films of these materials on their superconducting properties. Another niobium compound, niobium dioxide, exhibits a phase transition from a room-temperature insulating state to a high-temperature metallic state. Such insulator-to-metal transitions are not well-understood, even in bulk, and there is a great deal of debate over the mechanism that drives them. Experimental studies on niobium dioxide thin films are still somewhat rare and thus have the potential to contribute a great deal to the understanding of the mechanisms behind the transition. This dissertation presents structure-property correlation studies on niobium and niobium compound superconducting thin films such as those discussed above, and also reports on the first experimental studies of the light-induced insulator-to-metal transition in niobium dioxide.
Download or read book Superconducting Devices Materials written by and published by . This book was released on 1968 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Ion Implanted Gd on the Superconducting Properties of Thin Nb Films written by Paul David Scholten and published by . This book was released on 1976 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Superconducting Properties of Niobium Germanium written by Kenneth Edward Kihlstrom and published by . This book was released on 1982 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Superconducting Properties Of Ultrathin Niobium And Vanadium Films written by S. Park and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Superconducting and Normal Properties of NbN Produced by Ion Implantation of Niobium Thin Films written by Jeffrey P. Johnson and published by . This book was released on 1985 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure Low Temperature Conductivity and Superconducting Properties of Niobium silicon Composite Films microform written by Denhoff, Michael Wayne and published by National Library of Canada. This book was released on 1985 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Vapor Deposition of Niobium Nitride Thin Films and Superconducting Properties written by Ching-ho Wang and published by . This book was released on 1973 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Superconductivity of Metals and Alloys written by Pierre-Gilles de Gennes and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Structure and Superconducting Properties of Bulk and Thin Film Hard Superconductors written by Ramasubramanian Somasundaram and published by . This book was released on 1974 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
