The mixed state of type II superconductors is an ideal medium for the study of correlated systems since the density of vortices which penetrate the sample, as well as the driving force, can be tuned such as to measure their effects on correlations. The weak pinning character of the Fe xNi1-xZr2 metal glasses permits vortex phases to be probed by dissipative transport (longitudinal and Hall) measurements. The complete phase diagram in this regime is mapped out as a function of magnetic field, driving current and temperature using results from longitudinal resistance measurements. The longitudinal measurements show a huge peak effect with a driving force induced pinning phase known to arise from a disordering transition. The Hall resistance measurements lead to remarkable new results: a critical angle dependence of the vortex flow direction when entering or leaving the disordered phase is revealed, which suggests the existence of orientational phase transitions.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.81354 |
| Date | January 2004 |
| Creators | Lefebvre, Josianne |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Physics.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 002187904, proquestno: AAIMR06417, Theses scanned by UMI/ProQuest. |
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