{"id":17001,"date":"2018-03-09T09:04:52","date_gmt":"2018-03-09T09:04:52","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/time-dependent-processes-in-magnetic-systems\/"},"modified":"2018-03-09T09:04:52","modified_gmt":"2018-03-09T09:04:52","slug":"time-dependent-processes-in-magnetic-systems","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/time-dependent-processes-in-magnetic-systems\/","title":{"rendered":"Time dependent processes in magnetic systems"},"content":{"rendered":"<h2>Tesis doctoral de <strong> \u00f3scar Iglesias Clotas <\/strong><\/h2>\n<p>En este trabajo se presentan modelos para el estudio de los procesos de dependencia en el tiempo de las propiedades magn\u00e9ticas de diferentes tipos de materiales magn\u00e9ticos, b\u00e1sicamente sistemas de part\u00edculas peque\u00f1as y cpas delgadas con aplicaci\u00f3n en el campo del almacenamiento magn\u00e9tico. a lo largo del mismo se han estudiado las distintas problem\u00e1ticas asociadas al creciente aumento de la densidad de grabaci\u00f3n en soportes magn\u00e9ticos. en primer lugar se han considerado los efectos de tama\u00f1o finito y de superficie asociados a la reducci\u00f3n del tama\u00f1o de las part\u00edculas magn\u00e9ticas a trav\u00e9s de simulaciones monte carlo de un modelo reticular para una \u00fanica part\u00edcula de maghemita. Se han estudiado tambi\u00e9n los efectos de desmagnetizaci\u00f3n t\u00e9rmica a trav\u00e9s de un modelo fenomenol\u00f3gico para la relajaci\u00f3n magn\u00e9tica basado en llamada ley de escala tln(t\/to). A trav\u00e9s de c\u00e1lculos num\u00e9ricos basados en este modelo y su aplicaci\u00f3n a medidas experimentales, se ha mostrado como el modelo permite extraer informaci\u00f3n de las barreras de energ\u00eda microsc\u00f3picas responsables de la relajaci\u00f3n, incluso cuando \u00e9sta se da en presencia de un campo magn\u00e9tico. La existencia de interacciones dipolares entre part\u00edculas puede tambi\u00e9n incorporarse dentro del marco del anterior modelo fenomenol\u00f3gico. A trav\u00e9s de un an\u00e1lisis de la relajaci\u00f3n calculadas mediante simulaci\u00f3n en la ley de relajaci\u00f3n y en la estructura de las distribuciones de barreras energ\u00e9ticas. Se han tratado tambi\u00e9n sistemas con m\u00e1s complejidad de interacciones magn\u00e9ticas como son las capas delgadas, modelizadas a trav\u00e9s de redes bidimensionales de espines con anisotrop\u00eda perpendicular al plano. Las simulaciones realizadas para distintos valores de la interacci\u00f3n dipolar y de intercambio reproducen la gran variedad de estructuras magn\u00e9ticas observadas en sistemas reales. Adem\u00e1s, el modelo permite entender la dependencia de las estructuras formadas en la historia<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Time dependent processes in magnetic systems<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Time dependent processes in magnetic systems <\/li>\n<li><strong>Autor:<\/strong>\u00a0 \u00f3scar Iglesias Clotas <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 24\/05\/2002<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Am\u00edlcar Labarta Rodr\u00edguez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: jose Rivas rey <\/li>\n<li> Gonz\u00e1lez fern\u00e1ndez Jos\u00e9 m. (vocal)<\/li>\n<li>xavier Batlle gelabert (vocal)<\/li>\n<li>Fernando Badia pascual (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de \u00f3scar Iglesias Clotas En este trabajo se presentan modelos para el estudio de los procesos de dependencia [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[951,199,1008,1007],"tags":[33086,53432,53431,2493,53430,20353],"class_list":["post-17001","post","type-post","status-publish","format-standard","hentry","category-barcelona","category-fisica","category-fisica-del-estado-solido","category-propiedades-magneticas-de-los-solidos","tag-amilcar-labarta-rodriguez","tag-fernando-badia-pascual","tag-gonzalez-fernandez-jose-m","tag-jose-rivas-rey","tag-oscar-iglesias-clotas","tag-xavier-batlle-gelabert"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/17001","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/comments?post=17001"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/17001\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=17001"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=17001"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=17001"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}