{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/82927"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/82927","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"X-Ray Scattering Study of the Transition Dynamics in Relaxor Ferroelectric Lead (Magnesium(1/3) Niobium(2/3)) Oxygen(3) (Pmn)","abstract":"Thermal diffuse scattering measurements were performed at several temperatures. A [011] transverse optic soft mode was determined to exist. The temperature dependence of this phonon mode was carefully studied as the transition is approached, and down to 40 K. The q-dependency of the freezing process was carefully studied, and it was shown that the freezing takes place simultaneously at the zone center (ZC) and zone boundary (ZB). Coupled with results obtained from the SRO peak, these results imply that both ferroelectric and anti-ferroelectric fluctuations are present in the structure. (Abstract shortened by UMI.).","abstract_html":"Thermal diffuse scattering measurements were performed at several temperatures. A [011] transverse optic soft mode was determined to exist. The temperature dependence of this phonon mode was carefully studied as the transition is approached, and down to 40 K. The q-dependency of the freezing process was carefully studied, and it was shown that the freezing takes place simultaneously at the zone center (ZC) and zone boundary (ZB). Coupled with results obtained from the SRO peak, these results imply that both ferroelectric and anti-ferroelectric fluctuations are present in the structure. (Abstract shortened by UMI.).","abstract_has_math":false,"creators":["Gosula, Vijaya Reddy"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Materials Science and Engineering","degree_department":null,"school":null,"contributors":["Chen, Haydn"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T20:53:40Z","date_published":"2015-09-25T20:53:40Z","updated_at":"2026-07-22T22:26:20Z","subjects":["Engineering, Materials Science"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI9971084"],"render_values":[{"text":"(MiAaPQ)AAI9971084","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/82927","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Chen, Haydn"]},{"key":"dc:creator","label":"Author","values":["Gosula, Vijaya Reddy"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T20:53:40Z","10000-01-01","2000"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Materials Science and Engineering"]},{"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":["Engineering, Materials Science"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/82927","(MiAaPQ)AAI9971084"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Thermal diffuse scattering measurements were performed at several temperatures. A [011] transverse optic soft mode was determined to exist. The temperature dependence of this phonon mode was carefully studied as the transition is approached, and down to 40 K. The q-dependency of the freezing process was carefully studied, and it was shown that the freezing takes place simultaneously at the zone center (ZC) and zone boundary (ZB). Coupled with results obtained from the SRO peak, these results imply that both ferroelectric and anti-ferroelectric fluctuations are present in the structure. (Abstract shortened by UMI.).","Made available in DSpace on 2015-09-25T20:53:40Z (GMT). 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A [011] transverse optic soft mode was determined to exist. The temperature dependence of this phonon mode was carefully studied as the transition is approached, and down to 40 K. The q-dependency of the freezing process was carefully studied, and it was shown that the freezing takes place simultaneously at the zone center (ZC) and zone boundary (ZB). Coupled with results obtained from the SRO peak, these results imply that both ferroelectric and anti-ferroelectric fluctuations are present in the structure. (Abstract shortened by UMI.).","Made available in DSpace on 2015-09-25T20:53:40Z (GMT). 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