{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/19466"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/19466","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Oxygen-17 nuclear magnetic resonance studies of high-temperature superconductors","abstract":"This study presents $\\sp{17}$O NMR spectra of randomly and magnetically oriented samples of various high-$T\\sb{c}$ superconductors. Systems under investigation include: (BaK)BiO$\\sb3$, La$\\sb{1.85}$Sr$\\sb{0.15}$CuO$\\sb4$, YBa$\\sb2$Cu$\\sb3$O$\\sb{\\rm 7-x}$, Bi$\\sb2$Sr$\\sb2$CaCu$\\sb2$O$\\sb8$ and Tl$\\sb2$Ba$\\sb2$CaCu$\\sb2$O$\\sb8$. Measurements of the angular dependence of the oxygen frequency shifts and corresponding satellite transitions have enabled us to assign the oxygen sites of magnetically oriented YBa$\\sb2$Cu$\\sb3$O$\\sb{\\rm 7-x}$, as well as determine the e.f.g. parameters for various sites. The temperature and angular dependence of the oxygen frequency shifts and relaxation rates have been studied as well as the effect of the oxygen stoichiometry and rare earth substitutions. Finally, we have compared the $\\sp{17}$O frequency shifts of YBa$\\sb2$Cu$\\sb3$O$\\sb{\\rm 7-x}$ to those of the precursor oxides, and other high-$T\\sb{c}$ compounds, and have consistently observed a paramagnetically shifted feature associated with the CuO$\\sb2$ planes ($\\sim$2000 ppm from H$\\sb2$O) and a second feature or set of features in the diamagnetic region (typically at $\\sim$400 ppm from H$\\sb2$O) which are attributed to sites other than the CuO$\\sb2$ planes. Precursor effects in the normal phase of YBa$\\sb2$Cu$\\sb3$O$\\sb{\\rm 7-x}$ are investigated, pointing strongly to antiferromagnetic fluctuations which may persist in the superconductive phase.","abstract_html":"This study presents $\\sp{17}$O NMR spectra of randomly and magnetically oriented samples of various high-$T\\sb{c}$ superconductors. Systems under investigation include: (BaK)BiO$\\sb3$, La$\\sb{1.85}$Sr$\\sb{0.15}$CuO$\\sb4$, YBa$\\sb2$Cu$\\sb3$O$\\sb{\\rm 7-x}$, Bi$\\sb2$Sr$\\sb2$CaCu$\\sb2$O$\\sb8$ and Tl$\\sb2$Ba$\\sb2$CaCu$\\sb2$O$\\sb8$. Measurements of the angular dependence of the oxygen frequency shifts and corresponding satellite transitions have enabled us to assign the oxygen sites of magnetically oriented YBa$\\sb2$Cu$\\sb3$O$\\sb{\\rm 7-x}$, as well as determine the e.f.g. parameters for various sites. The temperature and angular dependence of the oxygen frequency shifts and relaxation rates have been studied as well as the effect of the oxygen stoichiometry and rare earth substitutions. Finally, we have compared the $\\sp{17}$O frequency shifts of YBa$\\sb2$Cu$\\sb3$O$\\sb{\\rm 7-x}$ to those of the precursor oxides, and other high-$T\\sb{c}$ compounds, and have consistently observed a paramagnetically shifted feature associated with the CuO$\\sb2$ planes ($\\sim$2000 ppm from H$\\sb2$O) and a second feature or set of features in the diamagnetic region (typically at $\\sim$400 ppm from H$\\sb2$O) which are attributed to sites other than the CuO$\\sb2$ planes. Precursor effects in the normal phase of YBa$\\sb2$Cu$\\sb3$O$\\sb{\\rm 7-x}$ are investigated, pointing strongly to antiferromagnetic fluctuations which may persist in the superconductive phase.","abstract_has_math":true,"creators":["Coretsopoulos, Christopher Nicholas"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Chemistry","degree_department":null,"school":null,"contributors":["Oldfield, Eric"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-07T12:08:26Z","date_published":"2011-05-07T12:08:26Z","updated_at":"2026-07-22T22:25:14Z","subjects":["Chemistry, Inorganic","Chemistry, Physical","Physics, Condensed Matter"],"languages":["eng"],"rights":["Copyright 1989 Coretsopoulos, Christopher Nicholas"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9010838","(UMI)AAI9010838"],"render_values":[{"text":"AAI9010838","href":null,"code":true},{"text":"(UMI)AAI9010838","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/19466","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Oldfield, Eric"]},{"key":"dc:creator","label":"Author","values":["Coretsopoulos, Christopher Nicholas"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T12:08:26Z","10000-01-01","1989"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemistry"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Chemistry, Inorganic","Chemistry, Physical","Physics, Condensed Matter"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1989 Coretsopoulos, Christopher Nicholas"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9010838","(UMI)AAI9010838","http://hdl.handle.net/2142/19466"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["This study presents $\\sp{17}$O NMR spectra of randomly and magnetically oriented samples of various high-$T\\sb{c}$ superconductors. Systems under investigation include: (BaK)BiO$\\sb3$, La$\\sb{1.85}$Sr$\\sb{0.15}$CuO$\\sb4$, YBa$\\sb2$Cu$\\sb3$O$\\sb{\\rm 7-x}$, Bi$\\sb2$Sr$\\sb2$CaCu$\\sb2$O$\\sb8$ and Tl$\\sb2$Ba$\\sb2$CaCu$\\sb2$O$\\sb8$. Measurements of the angular dependence of the oxygen frequency shifts and corresponding satellite transitions have enabled us to assign the oxygen sites of magnetically oriented YBa$\\sb2$Cu$\\sb3$O$\\sb{\\rm 7-x}$, as well as determine the e.f.g. parameters for various sites. The temperature and angular dependence of the oxygen frequency shifts and relaxation rates have been studied as well as the effect of the oxygen stoichiometry and rare earth substitutions. Finally, we have compared the $\\sp{17}$O frequency shifts of YBa$\\sb2$Cu$\\sb3$O$\\sb{\\rm 7-x}$ to those of the precursor oxides, and other high-$T\\sb{c}$ compounds, and have consistently observed a paramagnetically shifted feature associated with the CuO$\\sb2$ planes ($\\sim$2000 ppm from H$\\sb2$O) and a second feature or set of features in the diamagnetic region (typically at $\\sim$400 ppm from H$\\sb2$O) which are attributed to sites other than the CuO$\\sb2$ planes. Precursor effects in the normal phase of YBa$\\sb2$Cu$\\sb3$O$\\sb{\\rm 7-x}$ are investigated, pointing strongly to antiferromagnetic fluctuations which may persist in the superconductive phase.","Made available in DSpace on 2011-05-07T12:08:26Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9010838.pdf: 4723803 bytes, checksum: 4caeb169f0568886a06fa50bc192404f (MD5) Previous issue date: 1989","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:37:09Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:15:13-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"]},{"key":"dc:title","label":"Title","values":["Oxygen-17 nuclear magnetic resonance studies of high-temperature superconductors"]}]}],"canonical_facts":{"dc:contributor":["Oldfield, Eric"],"dc:creator":["Coretsopoulos, Christopher Nicholas"],"dc:date":["2011-05-07T12:08:26Z","10000-01-01","1989"],"dc:description":["This study presents $\\sp{17}$O NMR spectra of randomly and magnetically oriented samples of various high-$T\\sb{c}$ superconductors. Systems under investigation include: (BaK)BiO$\\sb3$, La$\\sb{1.85}$Sr$\\sb{0.15}$CuO$\\sb4$, YBa$\\sb2$Cu$\\sb3$O$\\sb{\\rm 7-x}$, Bi$\\sb2$Sr$\\sb2$CaCu$\\sb2$O$\\sb8$ and Tl$\\sb2$Ba$\\sb2$CaCu$\\sb2$O$\\sb8$. Measurements of the angular dependence of the oxygen frequency shifts and corresponding satellite transitions have enabled us to assign the oxygen sites of magnetically oriented YBa$\\sb2$Cu$\\sb3$O$\\sb{\\rm 7-x}$, as well as determine the e.f.g. parameters for various sites. The temperature and angular dependence of the oxygen frequency shifts and relaxation rates have been studied as well as the effect of the oxygen stoichiometry and rare earth substitutions. Finally, we have compared the $\\sp{17}$O frequency shifts of YBa$\\sb2$Cu$\\sb3$O$\\sb{\\rm 7-x}$ to those of the precursor oxides, and other high-$T\\sb{c}$ compounds, and have consistently observed a paramagnetically shifted feature associated with the CuO$\\sb2$ planes ($\\sim$2000 ppm from H$\\sb2$O) and a second feature or set of features in the diamagnetic region (typically at $\\sim$400 ppm from H$\\sb2$O) which are attributed to sites other than the CuO$\\sb2$ planes. Precursor effects in the normal phase of YBa$\\sb2$Cu$\\sb3$O$\\sb{\\rm 7-x}$ are investigated, pointing strongly to antiferromagnetic fluctuations which may persist in the superconductive phase.","Made available in DSpace on 2011-05-07T12:08:26Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9010838.pdf: 4723803 bytes, checksum: 4caeb169f0568886a06fa50bc192404f (MD5) Previous issue date: 1989","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:37:09Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:15:13-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"],"dc:identifier":["AAI9010838","(UMI)AAI9010838","http://hdl.handle.net/2142/19466"],"dc:language":["eng"],"dc:rights":["Copyright 1989 Coretsopoulos, Christopher Nicholas"],"dc:subject":["Chemistry, Inorganic","Chemistry, Physical","Physics, Condensed Matter"],"dc:title":["Oxygen-17 nuclear magnetic resonance studies of high-temperature superconductors"],"dc:type":["text"],"thesis:degree_discipline":["Chemistry"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:14Z"}