{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/25317"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/25317","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Magnetic resonance in amorphous iron-nickel alloys","abstract":"An ESR study on amorphous FexNi80-xP20 alloys was performed at 1.1 Ghz and 9.3 GHz, where x=8, 10, and 16. Fe8Ni72P20 and Fe10Ni70P20 show paramagnetic to spin-glass transitions, while Fe16N~4P20 shows paramagnetic to ferromagnetic and ferromagnetic to spin-glass transitions. The lineshape, at both frequencies, undergoes a progressive distortion as the temperature is reduced. We use an improved dynamical model to fit the distorted lineshapes and demonstrate that there is a tendency for the relaxation rate to vanish as is approached. In the Tf spin-glass regime, we also find a shift in resonance position, in addition to the dynamical one, which is due to the existence of a static anisotropy field in the spin-glass state. The anisotropic energy K(T) is found to be proportional to (I-T/Tf). The relaxation rate can be fitted to a power-law and an Arrhenius Law temperature behaviors, however only power-law fitting gives reasonable fitting values, which indicates that the phase transition model is better able to explain the spin-glass transition phenomena.","abstract_html":"An ESR study on amorphous FexNi80-xP20 alloys was performed at 1.1 Ghz and 9.3 GHz, where x=8, 10, and 16. Fe8Ni72P20 and Fe10Ni70P20 show paramagnetic to spin-glass transitions, while Fe16N~4P20 shows paramagnetic to ferromagnetic and ferromagnetic to spin-glass transitions. The lineshape, at both frequencies, undergoes a progressive distortion as the temperature is reduced. We use an improved dynamical model to fit the distorted lineshapes and demonstrate that there is a tendency for the relaxation rate to vanish as is approached. In the Tf spin-glass regime, we also find a shift in resonance position, in addition to the dynamical one, which is due to the existence of a static anisotropy field in the spin-glass state. The anisotropic energy K(T) is found to be proportional to (I-T/Tf). The relaxation rate can be fitted to a power-law and an Arrhenius Law temperature behaviors, however only power-law fitting gives reasonable fitting values, which indicates that the phase transition model is better able to explain the spin-glass transition phenomena.","abstract_has_math":false,"creators":["Hou, Ming-Kang"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Salamon, Myron B."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-06-07T15:14:31Z","date_published":"2011-06-07T15:14:31Z","updated_at":"2026-07-22T22:25:24Z","subjects":["magnetic resonance","amorphous iron-nickel alloys","ESR study","paramagnetic transitions","spin-glass transitions"],"languages":["en"],"rights":["1984 Ming-Kang Hou"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["5259076"],"render_values":[{"text":"5259076","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/25317","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Salamon, Myron B."]},{"key":"dc:creator","label":"Author","values":["Hou, Ming-Kang"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-06-07T15:14:31Z","10000-01-01","1984"]},{"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":["magnetic resonance","amorphous iron-nickel alloys","ESR study","paramagnetic transitions","spin-glass transitions"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["1984 Ming-Kang Hou"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["5259076","http://hdl.handle.net/2142/25317"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["An ESR study on amorphous FexNi80-xP20 alloys was performed at 1.1 Ghz and 9.3 GHz, where x=8, 10, and 16. Fe8Ni72P20 and Fe10Ni70P20 show paramagnetic to spin-glass transitions, while Fe16N~4P20 shows paramagnetic to ferromagnetic and ferromagnetic to spin-glass transitions. The lineshape, at both frequencies, undergoes a progressive distortion as the temperature is reduced. We use an improved dynamical model to fit the distorted lineshapes and demonstrate that there is a tendency for the relaxation rate to vanish as is approached. In the Tf spin-glass regime, we also find a shift in resonance position, in addition to the dynamical one, which is due to the existence of a static anisotropy field in the spin-glass state. The anisotropic energy K(T) is found to be proportional to (I-T/Tf). The relaxation rate can be fitted to a power-law and an Arrhenius Law temperature behaviors, however only power-law fitting gives reasonable fitting values, which indicates that the phase transition model is better able to explain the spin-glass transition phenomena.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-07T15:14:31Z No. of bitstreams: 1 1984_hou.pdf: 2612983 bytes, checksum: d983ad338eccbbb8848ff9ece8bd784c (MD5)","Made available in DSpace on 2011-06-07T15:14:31Z (GMT). No. of bitstreams: 1 1984_hou.pdf: 2612983 bytes, checksum: d983ad338eccbbb8848ff9ece8bd784c (MD5) Previous issue date: 1984","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-06-07T15:14:32Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:13:31-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Thesis","U of I Only"]},{"key":"dc:title","label":"Title","values":["Magnetic resonance in amorphous iron-nickel alloys"]}]}],"canonical_facts":{"dc:contributor":["Salamon, Myron B."],"dc:creator":["Hou, Ming-Kang"],"dc:date":["2011-06-07T15:14:31Z","10000-01-01","1984"],"dc:description":["An ESR study on amorphous FexNi80-xP20 alloys was performed at 1.1 Ghz and 9.3 GHz, where x=8, 10, and 16. Fe8Ni72P20 and Fe10Ni70P20 show paramagnetic to spin-glass transitions, while Fe16N~4P20 shows paramagnetic to ferromagnetic and ferromagnetic to spin-glass transitions. The lineshape, at both frequencies, undergoes a progressive distortion as the temperature is reduced. We use an improved dynamical model to fit the distorted lineshapes and demonstrate that there is a tendency for the relaxation rate to vanish as is approached. In the Tf spin-glass regime, we also find a shift in resonance position, in addition to the dynamical one, which is due to the existence of a static anisotropy field in the spin-glass state. The anisotropic energy K(T) is found to be proportional to (I-T/Tf). The relaxation rate can be fitted to a power-law and an Arrhenius Law temperature behaviors, however only power-law fitting gives reasonable fitting values, which indicates that the phase transition model is better able to explain the spin-glass transition phenomena.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-07T15:14:31Z No. of bitstreams: 1 1984_hou.pdf: 2612983 bytes, checksum: d983ad338eccbbb8848ff9ece8bd784c (MD5)","Made available in DSpace on 2011-06-07T15:14:31Z (GMT). No. of bitstreams: 1 1984_hou.pdf: 2612983 bytes, checksum: d983ad338eccbbb8848ff9ece8bd784c (MD5) Previous issue date: 1984","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-06-07T15:14:32Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:13:31-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Thesis","U of I Only"],"dc:identifier":["5259076","http://hdl.handle.net/2142/25317"],"dc:language":["en"],"dc:rights":["1984 Ming-Kang Hou"],"dc:subject":["magnetic resonance","amorphous iron-nickel alloys","ESR study","paramagnetic transitions","spin-glass transitions"],"dc:title":["Magnetic resonance in amorphous iron-nickel alloys"],"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"}