{"id":38717,"date":"2018-03-09T09:38:25","date_gmt":"2018-03-09T09:38:25","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/magnetismo-de-monocristales-y-peliculas-delgadas-de-intermetalicos-fuertemente-anisotropos-de-tr-con-fe-y-zn\/"},"modified":"2018-03-09T09:38:25","modified_gmt":"2018-03-09T09:38:25","slug":"magnetismo-de-monocristales-y-peliculas-delgadas-de-intermetalicos-fuertemente-anisotropos-de-tr-con-fe-y-zn","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/magnetismo-de-monocristales-y-peliculas-delgadas-de-intermetalicos-fuertemente-anisotropos-de-tr-con-fe-y-zn\/","title":{"rendered":"Magnetismo de monocristales y peliculas delgadas de intermetalicos fuertemente anisotropos de tr con fe y zn."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Cristina Abadia Bengoa <\/strong><\/h2>\n<p>Se han estudiado las propiedades magn\u00e9ticas de los compuestos intermet\u00e1licos tetragonales rfe11ti con r=y, ho, tb; prestando especial atenci\u00f3n a su anisotrop\u00eda magnetocristalina. se ha descartado la existencia de una transici\u00f3n de reorientaci\u00f3n de spin para el hofe11ti punto controvertido en la literatura. Se ha estudiado la reorientaci\u00f3n de spin para el tbfe11ti, determinando la dependencia del \u00e1ngulo de la direcci\u00f3n f\u00e1cil con el eje c, con la temperatura, para distintos campos magn\u00e9ticos aplicados. Utilizando un modelo de campo medio con dos subredes, en el que el comportamiento de la subred de fe se describe fenomenol\u00f3gicamente a partir del compuesto isoestructural yfe11ti, se han determinado los par\u00e1metros de campo el\u00e9ctrico cristalino hasta orden sexto y de canje para el hofe11ti y para el tbfe11ti.  se ha estudiado el acoplo magnetoel\u00e1stico en el intermet\u00e1lico tetragonal de magnetismo itinerante y2fe14b. Se han determinado los distintos modos de deformaci\u00f3n irreducibles de su celda cristalina, aislando las deformaciones puras de campo cristalino a un-ion de volumen y tetragonal, que se han explicado con un modelo de magnetoestricci\u00f3n(ms) de stoner-wohlfarth que hemos extendido para el caso de simetr\u00eda tetragonal. En base a un modelo de hubbard se ha explicado la ms espont\u00e1nea de acoplo magnetoel\u00e1stico a dos iones del y2fe14b. Se concluye que este intermet\u00e1lico se comporta como un ferromagn\u00e9tico itinerante tipo hubbard por lo que respecta a su magnetoestricci\u00f3n espont\u00e1nea.  se ha estudiado el comportamiento magn\u00e9tico y magnetoel\u00e1stico de pel\u00edculas delgadas de nd2fe14b de diferentes espesores. Para ello se ha fabricado una celda capacitiva de silica. se han determinado los valores de las tensiones magnetoel\u00e1sticas b127 de las pel\u00edculas y del monocristal de nd2fe14b que son inferiores en todos los casos a 107.Pa, valores adecuados para la utilizaci\u00f3n de estos materiales como imanes en la<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Magnetismo de monocristales y peliculas delgadas de intermetalicos fuertemente anisotropos de tr con fe y zn.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Magnetismo de monocristales y peliculas delgadas de intermetalicos fuertemente anisotropos de tr con fe y zn. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Cristina Abadia Bengoa <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Zaragoza<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 20\/10\/1998<\/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>Agustin Del Moral Gamiz<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Juan Bartolom\u00e9 sanjoaqu\u00edn <\/li>\n<li>Manuel Vazquez (vocal)<\/li>\n<li>krzyzstof Kulakowski (vocal)<\/li>\n<li>benjamin Martinez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Cristina Abadia Bengoa Se han estudiado las propiedades magn\u00e9ticas de los compuestos intermet\u00e1licos tetragonales rfe11ti con r=y, [&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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