A heretofore unstudied configuration of the superconducting spin valve, (SSV) is presented in which nanometer scale layers of Niobium (Nb) and Permalloy (Py) are used to prepare an F'FS, pinned ferromagnet (F) /free Ferromagnet (F) /superconducting (S) structure. Thin film samples were prepared in a high vacuum sputtering chamber and their properties were studied using a Physical Properties Measurement System. With the materials and equipment used it was determined that the SSV, superconducting spin valve effect, is obscured by the bulk effect when the Niobium thickness is greater than 160 nm and that for samples of Nb layers near thicknesses of 40 nm resistance induced by stray magnetic fields was the dominant characteristic in the magnetoresistance. For comparison, analogue FS bilayer and F'SF trilayer structures were also prepared. From the magnetoresistance (MR) in the FS bilayer it seems strongly likely that MR in the F'FS structure was only affected by the free ferromagnetic, F, layer.
|School:||California State University, Long Beach|
|School Location:||United States -- California|
|Source:||MAI 50/03M, Masters Abstracts International|
|Subjects:||Condensed matter physics|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be