{"id":33246,"date":"1997-10-11T00:00:00","date_gmt":"1997-10-11T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/estudio-termomagnetico-de-compuestos-intermetalicos-de-tierra-rara-y-metal-de-transicion\/"},"modified":"1997-10-11T00:00:00","modified_gmt":"1997-10-11T00:00:00","slug":"estudio-termomagnetico-de-compuestos-intermetalicos-de-tierra-rara-y-metal-de-transicion","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/estudio-termomagnetico-de-compuestos-intermetalicos-de-tierra-rara-y-metal-de-transicion\/","title":{"rendered":"Estudio termomagnetico de compuestos intermetalicos de tierra rara y metal de transicion."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Julio Javier Melero Estela <\/strong><\/h2>\n<p>Se ha desarrollado un modelo te]orico general para el estudio de las propiedades termomagn\u00e9ticas en compuestos intermet\u00e1licos de tierra rara y metal de transici]on. El modelo incluye t\u00e9rminos de esp\u00edn-]orbita, campo cristalino, intercambio magn\u00e9tico entre tierra rara y metal de transici]on, efecto zeeman debido a un campo magn\u00e9tico externo y anisotrop\u00eda del metal de transici]on.  hemos medido la capacidad calor\u00edfica de los compuestos rc05 que presentan reorientaci]on de esp\u00edn utilizando calorimetr\u00eda adiab\u00e1tica, calorimetr\u00eda ac y calorimetr\u00eda dsc. Las reorientaciones de esp\u00edn se han estudiado a partir de la contribuci]on magn\u00e9tica a la capacidad calor\u00edfica mediante el modelo te]orico desarrollado.  hemos verificado el grado de validez de los par\u00e1metros de intercambio y campo cristalino de otros autores determinando en algunos casos nuestro propio conjunto de par\u00e1metros. La validez del modelo y de los par\u00e1metros se ha verificado adem\u00e1s calculando otras propiedades termomagn\u00e9ticas, imanaci]on frente a temperatura y campo, \u00e1ngulo de la direcci]on de f\u00e1cil imanaci]on con el eje c, momento magn\u00e9tico y direcci]on de imanaci]on de cada subred, y comparando los resultados te]oricos con datos experimentales de otros autores junto con nuestros resultados de capacidad calor\u00edfica.  hemos medido la capacidad calor\u00edfica de algunos compuestos pertenecientes a las familias rfe11 ti y rfe10.5 mo1.5, en particular aqu\u00e9llos para los que se han descrito reorientaciones de esp\u00edn. S]olo se han observado anomal\u00edas en la capacidad calor\u00edfica en los compuestos ndfe11 ti, erfe11 ti y erfe10.5 mo1.5. Para estos compuestos hemos estudiado la contribuci]on magn\u00e9tica a la capacidad calor\u00edfica con el modelo te]orico verificando el grado de validez de los p\u00e1rametros de intercambio y campo cristalino encontrados en la literatura. Para los compuestos dyfe11 ti y tbfe11 ti, en los que no hemos observado las reorientaciones de esp\u00ed<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Estudio termomagnetico de compuestos intermetalicos de tierra rara y metal de transicion.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Estudio termomagnetico de compuestos intermetalicos de tierra rara y metal de transicion. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Julio Javier Melero Estela <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Zaragoza<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 10\/11\/1997<\/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>Ram\u00f3n Burriel Lahoz<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: domingo Gonzalez alvarez <\/li>\n<li>Manuel V\u00e1zquez villalabeitia (vocal)<\/li>\n<li>daniel Fruchart (vocal)<\/li>\n<li>angel Lopez echarri (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Julio Javier Melero Estela Se ha desarrollado un modelo te]orico general para el estudio de las propiedades [&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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