{"id":131298,"date":"1996-01-01T00:00:00","date_gmt":"1996-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/analisis-de-los-mecanismos-de-coercitividad-en-distintos-sistemas-nanoestructurados\/"},"modified":"1996-01-01T00:00:00","modified_gmt":"1996-01-01T00:00:00","slug":"analisis-de-los-mecanismos-de-coercitividad-en-distintos-sistemas-nanoestructurados","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/analisis-de-los-mecanismos-de-coercitividad-en-distintos-sistemas-nanoestructurados\/","title":{"rendered":"Analisis de los mecanismos de coercitividad en distintos sistemas nanoestructurados."},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Julian Fernandez Cesar De <\/strong><\/h2>\n<p>Se ha analizado la relacion entre microestructura y coercitividad en tres sistemas magneticos distintos: el sistema granular compuesto fe\/\/si02, el sistema de aleaciones cristalinas formado por prndfeb, y un conjunto de muestras particuladas de hexaferrita de bario. En el primer sistema, la forma y el tama\u00f1o de las particulas del fe determina que el campo coercitivo sea mucho mayor que el correspondiente al modelo de rotaccion coherentes.  por contra, en el sistema formado de prndfeb y en el de particulas de hexaferrita de bario, la microestructura determina que el campo coercitivo sea menor que el campo coercitivo en el modelo de rotaciones coherentes. Este hecho ha sido analizado en terminos del modelo micromagnetico y global. En el caso de las muestras de hexaferrita de bario, se han desarrollado modificaciones al modelo global que permiten analizar adecuadamente la relacion entre microestructura y coercitividad, y permiten analizar los posibles mecanismos de inversion de la imanacion. Los resultados correspondientes a los dos modelos indican que, tanto en el sistema de prndfeb como en las muestras con hexaferrita de bario, la mejora de la estructura cristalina produce un aumento de campos dipolares desimanadores.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Analisis de los mecanismos de coercitividad en distintos sistemas nanoestructurados.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Analisis de los mecanismos de coercitividad en distintos sistemas nanoestructurados. <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Julian Fernandez Cesar De <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1996<\/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> Gonzalez Fernandez Jes\u00fas M.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Antonio Hernando Grande <\/li>\n<li>Carmen Ocal Garcia (vocal)<\/li>\n<li>Carlos Serna Pereda (vocal)<\/li>\n<li>Juli\u00e1n Mar\u00eda Gonz\u00e1lez Est\u00e9vez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Julian Fernandez Cesar De Se ha analizado la relacion entre microestructura y coercitividad en tres sistemas magneticos [&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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