{"id":76567,"date":"2005-06-10T00:00:00","date_gmt":"2005-06-10T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/propiedades-magneticas-de-sistemas-nano-y-micrometricos-mulitcapas-de-nanoparticulas-decobalto-y-redes-de-agujeros-en-hierro\/"},"modified":"2005-06-10T00:00:00","modified_gmt":"2005-06-10T00:00:00","slug":"propiedades-magneticas-de-sistemas-nano-y-micrometricos-mulitcapas-de-nanoparticulas-decobalto-y-redes-de-agujeros-en-hierro","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/propiedades-magneticas-de-los-solidos\/propiedades-magneticas-de-sistemas-nano-y-micrometricos-mulitcapas-de-nanoparticulas-decobalto-y-redes-de-agujeros-en-hierro\/","title":{"rendered":"Propiedades magneticas de sistemas nano y micrometricos: mulitcapas de nanoparticulas decobalto y redes de agujeros en hierro"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Torres Bruna Jos\u00e9 Mar\u00eda <\/strong><\/h2>\n<p>Este trabajo versa sobre el cambio que sufren los materiales magn\u00e9ticos al pasar detama\u00f1os macrosc6picos a microscopicos y nanoscopicos. Se ha estructurado en dos partes.En la primera parte se estudian sistemas de nanoparticulas magneticas de cobalto, contama\u00f1os del orden del nanometro, sobre las que se han estudiado el efecto de la reducci\u00f3ndel tama\u00f1o de las particulas sobre la constante de anisotropia. Tambien se ha estudiado lainteraccion entre ellas.Se ha comprobado como al reducir el tama\u00f1o de las particulas, la anisotropia de estasaumenta en mas de un orden de magnitud respecto de la anisotropia del cobalto masivo.Tambien se ha desarrollado un modelo basado en interacciones dipolares que permitereproducir el resultado experimental de que la barrera de energia aumenta al aumentar lainteraccion entre las particulas.En la segunda parte se han estudiado redes de agujeros litografiadas en laminas delgadasde hierro. Los agujeros tienen tama\u00f1os del orden de la micra. Los resultados experimentalesmuestran que se puede controlar el campo coercitivo de la zona litografiada mediante losparametros de la red: tama\u00f1o de agujeros y separaci\u00f3n entre ellos.Tambi\u00e9n se ha desarrollado un programa para realizar simulaciones micromagneticas sobreestos sistemas que reproduce cualitativamente los resultados experimentales, y que ademaspermiten simular redes con la geometria que se desee.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Propiedades magneticas de sistemas nano y micrometricos: mulitcapas de nanoparticulas decobalto y redes de agujeros en hierro<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Propiedades magneticas de sistemas nano y micrometricos: mulitcapas de nanoparticulas decobalto y redes de agujeros en hierro <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Torres Bruna Jos\u00e9 Mar\u00eda <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Zaragoza<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 06\/10\/2005<\/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> Garcia Vinuesa Luis Miguel<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Manuel ricardo Ibarra garcia <\/li>\n<li>Francisco Lazaro osoro (vocal)<\/li>\n<li>oksana Chubykalo fesenko (vocal)<\/li>\n<li>frederic Petroff (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Torres Bruna Jos\u00e9 Mar\u00eda Este trabajo versa sobre el cambio que sufren los materiales magn\u00e9ticos al pasar [&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 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