{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/25602"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/25602","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Upper critical magnetic field of superconducting films with magnetic impurities","abstract":"We have measured the upper critical magnetic field, H(T), of c2 In-Mn and Pb-Mn alloy films. Hc2 was determined from the resistance of the films. The results were compared with the theory of Fulde and MakL This theory assumes that the electron-phonon coupling is weak, and that the interaction between the impurity spins and the conduction electron spins is weak. The theory predicts that the pair-breaking effect of the magnetic impurities is temperature-independent, and that the pair-breaking effects of the magnetic impurities and the applied magnetic field are additive. Furthermore, it predicts explicitly the temperature dependence of H' c2 The temperature dependence of Hc2 for the In-Mn alloy films is well described by the Fulde-Maki theory, despite. the moderately strong electron-phonon coupling and the strong interaction between the impurity spins and the conduction electron spins. The temperature dependence of Hc2 for the Pb-Mn alloy films is not well described by the Fulde-Maki theory, probably due to the strong electron-phonon coupling in Ph. However, even without a quantitatively correct theory, one can conclude from the Pb-Mn data that the pair-breaking effect of the magnetic impurities is temperature independent, and that the pair-breaking effects of the magnetic impurities and the applied magnetic field are additive. For Home of the Pb-Mn alloy films, there was a region of positive curvature in H(T) near the zero-field transition temperature. This c2 positive curvature is not understood.","abstract_html":"We have measured the upper critical magnetic field, H(T), of c2 In-Mn and Pb-Mn alloy films. Hc2 was determined from the resistance of the films. The results were compared with the theory of Fulde and MakL This theory assumes that the electron-phonon coupling is weak, and that the interaction between the impurity spins and the conduction electron spins is weak. The theory predicts that the pair-breaking effect of the magnetic impurities is temperature-independent, and that the pair-breaking effects of the magnetic impurities and the applied magnetic field are additive. Furthermore, it predicts explicitly the temperature dependence of H' c2 The temperature dependence of Hc2 for the In-Mn alloy films is well described by the Fulde-Maki theory, despite. the moderately strong electron-phonon coupling and the strong interaction between the impurity spins and the conduction electron spins. The temperature dependence of Hc2 for the Pb-Mn alloy films is not well described by the Fulde-Maki theory, probably due to the strong electron-phonon coupling in Ph. However, even without a quantitatively correct theory, one can conclude from the Pb-Mn data that the pair-breaking effect of the magnetic impurities is temperature independent, and that the pair-breaking effects of the magnetic impurities and the applied magnetic field are additive. For Home of the Pb-Mn alloy films, there was a region of positive curvature in H(T) near the zero-field transition temperature. This c2 positive curvature is not understood.","abstract_has_math":false,"creators":["Lemberger, Thomas Richard"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Ginsberg, D.M."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-06-30T16:49:11Z","date_published":"2011-06-30T16:49:11Z","updated_at":"2026-07-22T22:25:24Z","subjects":["upper critical magnetic field","superconducting films","magnetic impurities","Fulde","Maki"],"languages":["en"],"rights":["1978 Thomas Richard Lemberger"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["356062"],"render_values":[{"text":"356062","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/25602","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Ginsberg, D.M."]},{"key":"dc:creator","label":"Author","values":["Lemberger, Thomas Richard"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-06-30T16:49:11Z","10000-01-01","1978"]},{"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":["upper critical magnetic field","superconducting films","magnetic impurities","Fulde","Maki"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["1978 Thomas Richard Lemberger"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["356062","http://hdl.handle.net/2142/25602"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["We have measured the upper critical magnetic field, H(T), of c2 In-Mn and Pb-Mn alloy films. Hc2 was determined from the resistance of the films. The results were compared with the theory of Fulde and MakL This theory assumes that the electron-phonon coupling is weak, and that the interaction between the impurity spins and the conduction electron spins is weak. The theory predicts that the pair-breaking effect of the magnetic impurities is temperature-independent, and that the pair-breaking effects of the magnetic impurities and the applied magnetic field are additive. Furthermore, it predicts explicitly the temperature dependence of H' c2 The temperature dependence of Hc2 for the In-Mn alloy films is well described by the Fulde-Maki theory, despite. the moderately strong electron-phonon coupling and the strong interaction between the impurity spins and the conduction electron spins. The temperature dependence of Hc2 for the Pb-Mn alloy films is not well described by the Fulde-Maki theory, probably due to the strong electron-phonon coupling in Ph. However, even without a quantitatively correct theory, one can conclude from the Pb-Mn data that the pair-breaking effect of the magnetic impurities is temperature independent, and that the pair-breaking effects of the magnetic impurities and the applied magnetic field are additive. For Home of the Pb-Mn alloy films, there was a region of positive curvature in H(T) near the zero-field transition temperature. This c2 positive curvature is not understood.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-30T16:49:11Z No. of bitstreams: 1 1978_lemberger.pdf: 4660347 bytes, checksum: 4e8cc5c6689e69f55270b9e3ea1e47cd (MD5)","Made available in DSpace on 2011-06-30T16:49:11Z (GMT). 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The results were compared with the theory of Fulde and MakL This theory assumes that the electron-phonon coupling is weak, and that the interaction between the impurity spins and the conduction electron spins is weak. The theory predicts that the pair-breaking effect of the magnetic impurities is temperature-independent, and that the pair-breaking effects of the magnetic impurities and the applied magnetic field are additive. Furthermore, it predicts explicitly the temperature dependence of H' c2 The temperature dependence of Hc2 for the In-Mn alloy films is well described by the Fulde-Maki theory, despite. the moderately strong electron-phonon coupling and the strong interaction between the impurity spins and the conduction electron spins. The temperature dependence of Hc2 for the Pb-Mn alloy films is not well described by the Fulde-Maki theory, probably due to the strong electron-phonon coupling in Ph. However, even without a quantitatively correct theory, one can conclude from the Pb-Mn data that the pair-breaking effect of the magnetic impurities is temperature independent, and that the pair-breaking effects of the magnetic impurities and the applied magnetic field are additive. For Home of the Pb-Mn alloy films, there was a region of positive curvature in H(T) near the zero-field transition temperature. This c2 positive curvature is not understood.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-30T16:49:11Z No. of bitstreams: 1 1978_lemberger.pdf: 4660347 bytes, checksum: 4e8cc5c6689e69f55270b9e3ea1e47cd (MD5)","Made available in DSpace on 2011-06-30T16:49:11Z (GMT). No. of bitstreams: 1 1978_lemberger.pdf: 4660347 bytes, checksum: 4e8cc5c6689e69f55270b9e3ea1e47cd (MD5) Previous issue date: 1978","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-06-30T16:49:12Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:32:30-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Thesis","U of I Only"],"dc:identifier":["356062","http://hdl.handle.net/2142/25602"],"dc:language":["en"],"dc:rights":["1978 Thomas Richard Lemberger"],"dc:subject":["upper critical magnetic field","superconducting films","magnetic impurities","Fulde","Maki"],"dc:title":["Upper critical magnetic field of superconducting films with magnetic impurities"],"dc:type":["Dissertation / Thesis","text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."]},"updated_at":"2026-07-22T22:25:24Z"}