{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/25068"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/25068","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Heat capacities of three magnetic salts near their critical points","abstract":"Low temperature heat capacity measurements have been made near the . 6H20. A method of determining the critical point TA from a welldefined physical event has been found. For Mn(NH4)2(S04)2 . 6H20, TA = 0.1763°K, the width of the transition is known to +2 ~oK, and data have been obtained to T-T -4 A = +10 TA. The precision in the differences, T-T A , is a few microdegrees near Td A structured peak 5 mOK in width has been found in the heat capacity of K3Fe(CN)6 at about 0.130 oK. TA could not be defined uniquely for this salt. For CuK2(S04)2 . 6H20, TA = 0.0295°K, the width of the transition -2 is known to ±0.2 mOK, and data have been obtained to T-TA = ±3 x 10 TA The magnetic entropy has been found for the latter two salts. The results of these measurements are compared with the work of others on magnetic phase transitions and liquid-vapor phase transitions. Agreement with existing theories is discussed. These results will be published by the author, 0. E. Vilches, and J. C. Wheatley.","abstract_html":"Low temperature heat capacity measurements have been made near the . 6H20. A method of determining the critical point TA from a welldefined physical event has been found. For Mn(NH4)2(S04)2 . 6H20, TA = 0.1763°K, the width of the transition is known to +2 ~oK, and data have been obtained to T-T -4 A = +10 TA. The precision in the differences, T-T A , is a few microdegrees near Td A structured peak 5 mOK in width has been found in the heat capacity of K3Fe(CN)6 at about 0.130 oK. TA could not be defined uniquely for this salt. For CuK2(S04)2 . 6H20, TA = 0.0295°K, the width of the transition -2 is known to ±0.2 mOK, and data have been obtained to T-TA = ±3 x 10 TA The magnetic entropy has been found for the latter two salts. The results of these measurements are compared with the work of others on magnetic phase transitions and liquid-vapor phase transitions. Agreement with existing theories is discussed. These results will be published by the author, 0. E. Vilches, and J. C. Wheatley.","abstract_has_math":false,"creators":["Rayl, Martin"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Wheatley, J.C."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-31T16:16:23Z","date_published":"2011-05-31T16:16:23Z","updated_at":"2026-07-22T22:25:24Z","subjects":["low temperature heat capacity","magnetic salts","critical point","magnetic entropy"],"languages":["en"],"rights":["1966 Martin Rayl"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["6117609"],"render_values":[{"text":"6117609","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/25068","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Wheatley, J.C."]},{"key":"dc:creator","label":"Author","values":["Rayl, Martin"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-31T16:16:23Z","10000-01-01","1966"]},{"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":["low temperature heat capacity","magnetic salts","critical point","magnetic entropy"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["1966 Martin Rayl"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["6117609","http://hdl.handle.net/2142/25068"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Low temperature heat capacity measurements have been made near the . 6H20. A method of determining the critical point TA from a welldefined physical event has been found. For Mn(NH4)2(S04)2 . 6H20, TA = 0.1763°K, the width of the transition is known to +2 ~oK, and data have been obtained to T-T -4 A = +10 TA. The precision in the differences, T-T A , is a few microdegrees near Td A structured peak 5 mOK in width has been found in the heat capacity of K3Fe(CN)6 at about 0.130 oK. TA could not be defined uniquely for this salt. For CuK2(S04)2 . 6H20, TA = 0.0295°K, the width of the transition -2 is known to ±0.2 mOK, and data have been obtained to T-TA = ±3 x 10 TA The magnetic entropy has been found for the latter two salts. The results of these measurements are compared with the work of others on magnetic phase transitions and liquid-vapor phase transitions. Agreement with existing theories is discussed. These results will be published by the author, 0. E. Vilches, and J. C. Wheatley.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-05-31T16:16:23Z No. of bitstreams: 1 1966_rayl.pdf: 2894674 bytes, checksum: 28a29d07c2cde46efeb192c158920fbd (MD5)","Made available in DSpace on 2011-05-31T16:16:23Z (GMT). No. of bitstreams: 1 1966_rayl.pdf: 2894674 bytes, checksum: 28a29d07c2cde46efeb192c158920fbd (MD5) Previous issue date: 1966","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-05-31T16:16:23Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:13:29-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Thesis","U of I Only"]},{"key":"dc:title","label":"Title","values":["Heat capacities of three magnetic salts near their critical points"]}]}],"canonical_facts":{"dc:contributor":["Wheatley, J.C."],"dc:creator":["Rayl, Martin"],"dc:date":["2011-05-31T16:16:23Z","10000-01-01","1966"],"dc:description":["Low temperature heat capacity measurements have been made near the . 6H20. A method of determining the critical point TA from a welldefined physical event has been found. For Mn(NH4)2(S04)2 . 6H20, TA = 0.1763°K, the width of the transition is known to +2 ~oK, and data have been obtained to T-T -4 A = +10 TA. The precision in the differences, T-T A , is a few microdegrees near Td A structured peak 5 mOK in width has been found in the heat capacity of K3Fe(CN)6 at about 0.130 oK. TA could not be defined uniquely for this salt. For CuK2(S04)2 . 6H20, TA = 0.0295°K, the width of the transition -2 is known to ±0.2 mOK, and data have been obtained to T-TA = ±3 x 10 TA The magnetic entropy has been found for the latter two salts. The results of these measurements are compared with the work of others on magnetic phase transitions and liquid-vapor phase transitions. Agreement with existing theories is discussed. These results will be published by the author, 0. E. Vilches, and J. C. Wheatley.","Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-05-31T16:16:23Z No. of bitstreams: 1 1966_rayl.pdf: 2894674 bytes, checksum: 28a29d07c2cde46efeb192c158920fbd (MD5)","Made available in DSpace on 2011-05-31T16:16:23Z (GMT). No. of bitstreams: 1 1966_rayl.pdf: 2894674 bytes, checksum: 28a29d07c2cde46efeb192c158920fbd (MD5) Previous issue date: 1966","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-05-31T16:16:23Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:13:29-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis","Thesis","U of I Only"],"dc:identifier":["6117609","http://hdl.handle.net/2142/25068"],"dc:language":["en"],"dc:rights":["1966 Martin Rayl"],"dc:subject":["low temperature heat capacity","magnetic salts","critical point","magnetic entropy"],"dc:title":["Heat capacities of three magnetic salts near their critical points"],"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"}