{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/30803"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/30803","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Dielectric noise spectroscopy of relaxor ferroelectrics","abstract":"\"This thesis attempts to answer one simple question: are the dynamics of relaxor ferroelectrics cooperative? To accomplish this task, we have developed a promising new technique that is excellent at sorting out the internal dynamics of high dielectric materials. Specifically we have examined the dynamics of the relaxor ferroelectric material PLZT(B/65/35) in the \"\"frozen\"\" state. A relaxor ferroelectric is a material which has local ferroelectric order on the 1 Onm scale (nanodomains) but on longer scales the material is disordered. The nanodomains appear to go through a freezing transition and it is not known whether this is a cooperative effect. DNS examines the details of the polarization fluctuations from a mesoscopic capacitor, our smallest capacitor has an effective volume of 2x1Q-12cm3, or 107 nanodomains. From the statistical details, the lack of any non-Gaussian noise in this case, we are able to set an upper limit on the number of nanodomains that can act cooperatively in both equilibrium and near equilibrium.\"","abstract_html":""This thesis attempts to answer one simple question: are the dynamics of relaxor ferroelectrics cooperative? To accomplish this task, we have developed a promising new technique that is excellent at sorting out the internal dynamics of high dielectric materials. Specifically we have examined the dynamics of the relaxor ferroelectric material PLZT(B/65/35) in the ""frozen"" state. A relaxor ferroelectric is a material which has local ferroelectric order on the 1 Onm scale (nanodomains) but on longer scales the material is disordered. The nanodomains appear to go through a freezing transition and it is not known whether this is a cooperative effect. DNS examines the details of the polarization fluctuations from a mesoscopic capacitor, our smallest capacitor has an effective volume of 2x1Q-12cm3, or 107 nanodomains. From the statistical details, the lack of any non-Gaussian noise in this case, we are able to set an upper limit on the number of nanodomains that can act cooperatively in both equilibrium and near equilibrium."","abstract_has_math":false,"creators":["O'Brien, Kevin Patrick"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Weissman, Michael B."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012-05-04T18:20:14Z","date_published":"2012-05-04T18:20:14Z","updated_at":"2026-07-22T22:25:29Z","subjects":["dielectric noise","relaxor ferroelectrics","PLZT(B/65/35)","mesoscopic capacitor"],"languages":["en"],"rights":["©1997 O'Brien"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["4047197"],"render_values":[{"text":"4047197","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/30803","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Weissman, Michael B."]},{"key":"dc:creator","label":"Author","values":["O'Brien, Kevin Patrick"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2012-05-04T18:20:14Z","10000-01-01","1997"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation / Thesis","text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["dielectric noise","relaxor ferroelectrics","PLZT(B/65/35)","mesoscopic capacitor"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["©1997 O'Brien"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/30803","4047197"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["\"This thesis attempts to answer one simple question: are the dynamics of relaxor ferroelectrics cooperative? To accomplish this task, we have developed a promising new technique that is excellent at sorting out the internal dynamics of high dielectric materials. Specifically we have examined the dynamics of the relaxor ferroelectric material PLZT(B/65/35) in the \"\"frozen\"\" state. A relaxor ferroelectric is a material which has local ferroelectric order on the 1 Onm scale (nanodomains) but on longer scales the material is disordered. The nanodomains appear to go through a freezing transition and it is not known whether this is a cooperative effect. DNS examines the details of the polarization fluctuations from a mesoscopic capacitor, our smallest capacitor has an effective volume of 2x1Q-12cm3, or 107 nanodomains. From the statistical details, the lack of any non-Gaussian noise in this case, we are able to set an upper limit on the number of nanodomains that can act cooperatively in both equilibrium and near equilibrium.\"","Submitted by William Weathers (weathrs2@illinois.edu) on 2012-05-04T18:20:14Z No. of bitstreams: 1 1997_o'brien.pdf: 3575493 bytes, checksum: 4dc117448294387dd266e01aa770bf38 (MD5)","Made available in DSpace on 2012-05-04T18:20:14Z (GMT). No. of bitstreams: 1 1997_o'brien.pdf: 3575493 bytes, checksum: 4dc117448294387dd266e01aa770bf38 (MD5) Previous issue date: 1997","Restriction data tranferred 2014-07-01T11:34:41-05:00 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 William Weathers (weathrs2@illinois.edu) on 2012-05-04T18:20:14Z Item is restricted indefinitely.","Thesis","U of I Only"]},{"key":"dc:title","label":"Title","values":["Dielectric noise spectroscopy of relaxor ferroelectrics"]}]}],"canonical_facts":{"dc:contributor":["Weissman, Michael B."],"dc:creator":["O'Brien, Kevin Patrick"],"dc:date":["2012-05-04T18:20:14Z","10000-01-01","1997"],"dc:description":["\"This thesis attempts to answer one simple question: are the dynamics of relaxor ferroelectrics cooperative? To accomplish this task, we have developed a promising new technique that is excellent at sorting out the internal dynamics of high dielectric materials. Specifically we have examined the dynamics of the relaxor ferroelectric material PLZT(B/65/35) in the \"\"frozen\"\" state. A relaxor ferroelectric is a material which has local ferroelectric order on the 1 Onm scale (nanodomains) but on longer scales the material is disordered. The nanodomains appear to go through a freezing transition and it is not known whether this is a cooperative effect. DNS examines the details of the polarization fluctuations from a mesoscopic capacitor, our smallest capacitor has an effective volume of 2x1Q-12cm3, or 107 nanodomains. From the statistical details, the lack of any non-Gaussian noise in this case, we are able to set an upper limit on the number of nanodomains that can act cooperatively in both equilibrium and near equilibrium.\"","Submitted by William Weathers (weathrs2@illinois.edu) on 2012-05-04T18:20:14Z No. of bitstreams: 1 1997_o'brien.pdf: 3575493 bytes, checksum: 4dc117448294387dd266e01aa770bf38 (MD5)","Made available in DSpace on 2012-05-04T18:20:14Z (GMT). No. of bitstreams: 1 1997_o'brien.pdf: 3575493 bytes, checksum: 4dc117448294387dd266e01aa770bf38 (MD5) Previous issue date: 1997","Restriction data tranferred 2014-07-01T11:34:41-05:00 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 William Weathers (weathrs2@illinois.edu) on 2012-05-04T18:20:14Z Item is restricted indefinitely.","Thesis","U of I Only"],"dc:identifier":["http://hdl.handle.net/2142/30803","4047197"],"dc:language":["en"],"dc:rights":["©1997 O'Brien"],"dc:subject":["dielectric noise","relaxor ferroelectrics","PLZT(B/65/35)","mesoscopic capacitor"],"dc:title":["Dielectric noise spectroscopy of relaxor ferroelectrics"],"dc:type":["Dissertation / Thesis","text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."]},"updated_at":"2026-07-22T22:25:29Z"}