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Slichter, C.P. Milling, Craig Thomas 2012-05-31T22:51:23Z 2012-05-31T22:51:23Z 10000-01-01 2001 Nuclear Magnetic Resonance in the material YBa2Cu307 is strongly affected by the presence of magnetic vortices. The effects produced by the vortices can be used to gain knowledge about the physics of vortices and the physics of these materials. NMR nutation curves show that the vortices produce lossy (Ohmic) conduction in this material and greatly enhance the penetration depth over the London value. This enhancement is necessary to study crystal samples. The vortices induce supercurrents in the material which in turn enhance the density of states at the Fermi level. This enhancement,known as the Volovik Effect, can be observed in NMR as an increase in the spin-lattice relaxation rate as a function of frequency across the resonance line. The Volovik Effect was observed in both copper and oxygen in the plane of YBa2CU307. The Volovik Effect was not able to be observed with sufficient precision to discriminate between various theories because it was obscured by other physical mechanisms within the sample studied. Submitted by William Weathers (weathrs2@illinois.edu) on 2012-05-31T22:51:23Z No. of bitstreams: 1 2001_milling.pdf: 3387937 bytes, checksum: 7d64155d1a2faea3efc3e46942933922 (MD5) Made available in DSpace on 2012-05-31T22:51:23Z (GMT). No. of bitstreams: 1 2001_milling.pdf: 3387937 bytes, checksum: 7d64155d1a2faea3efc3e46942933922 (MD5) Previous issue date: 2001 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by William Weathers (weathrs2@illinois.edu) on 2012-05-31T22:51:23Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:10:22-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only http://hdl.handle.net/2142/31319 4377351 en ©2001 Milling nuclear magnetic resonance superconductors magnetic vortices YBa2̳Cu3̳O7̳ Volovik Effect Nuclear magnetic resonance studies of the effect of vortices on the high temperature superconductor YBa2̳Cu3̳O7̳ Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.