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Pines, David Thelen, Dean Michael 2011-04-26T15:22:30Z 2011-04-26T15:22:30Z 10000-01-01 1994-01 The author reports on a study of the magnetic properties of the cuprate superconductors in both the normal and superconducting states. The magnetic properties are studied by making comparison to the results of nuclear magnetic resonance experiments. The author gives a simplification of the method used to calculate the nuclear magnetic resonance spin-echo decay time for these materials. Experiments on the Y Ba2Gu301, Y Ba2Gu306.6J, Y Ba2Gu40s, Yt-xPrxBa2Cu301, and La1.ssSro.1sCu04 materials are analyzed. The compatibility of an electron spin susceptibility that has correlations incommensurate with the lattice as measured in neutron scattering experiments is found to be in conflict with the measured nuclear magnetic relaxation rates. The author reports on calculations of the electron spin susceptibility for the superconducting state of Y Ba2Cu30 7 using a band structure with nearest and next nearest neighbor hopping, a momentum dependent spin-spin interaction and a superconducting gap with dx'2-y2 symmetry. The calculated nuclear magnetic relaxation rates and Knight shift agree favorably with experiment. This work provides further evidence for a dx2_112 pairing state and demonstrates that antiferromagnetic correlations persist in the superconducting state. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-04-26T15:22:30Z No. of bitstreams: 1 1994_Thelen.pdf: 1569427 bytes, checksum: ac544935d8442ef26d59afcd7b01a1a2 (MD5) Made available in DSpace on 2011-04-26T15:22:30Z (GMT). No. of bitstreams: 1 1994_Thelen.pdf: 1569427 bytes, checksum: ac544935d8442ef26d59afcd7b01a1a2 (MD5) Previous issue date: 1994-01 Restriction data tranferred 2014-07-01T11:12:09-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-04-26T15:22:30Z Item is restricted indefinitely. Thesis U of I Only 3645426 http://hdl.handle.net/2142/18875 en 1994 Dean Michael Thelen antiferromagnetic correlations Superconductivity cuprate superconductors magnetic properties nuclear magnetic resonance spin-echo decay neutron scattering The magnetic properties of the cuprate superconductors Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.