{"id":31587,"date":"1997-01-01T00:00:00","date_gmt":"1997-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/medidas-de-relajaciones-magneticas-en-peliculas-delgadas-y-multicapas\/"},"modified":"1997-01-01T00:00:00","modified_gmt":"1997-01-01T00:00:00","slug":"medidas-de-relajaciones-magneticas-en-peliculas-delgadas-y-multicapas","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/medidas-de-relajaciones-magneticas-en-peliculas-delgadas-y-multicapas\/","title":{"rendered":"Medidas de relajaciones magneticas en peliculas delgadas y multicapas."},"content":{"rendered":"

Tesis doctoral de Martinez Albertos Bofarull Jos\u00e9 Luis <\/strong><\/h2>\n

En esta tesis se han analizado los procesos de relajacion magnetica de unos sistemas de multicapas bien caracterizados estructuralmente. La composicion y estructura de estos sistemas es la siguiente: muestra b1: 160 a fe3si\/si(100). muestra c1: superred (8 mc cu\/6 mc co)62\/cu(100). muestra c2: superred (5 mc cu\/9 mc co)103\/cu(100). en las medidas estructurales se han empleado las siguientes tecnicas: exafs(muestras a, multicapas fe-si, y b, peliculas delgadas de compuestos de fe-si; estudios adicionales sobre compuestos fe-si) y difraccion de rayos-x (muestra b1 y otras muestras de fe-si descritas en el capitulo 3). Sobre las muestras de co-cu existen estudios previos de difraccion de neutrones. de estas medidas se han obtenido los siguientes resultados: – en las multicapas fe-si preparadas en alto vacio con ritmos altos de deposicion (muestras a), el hierro se dispone en forma policristalina entre las capas de silicio. Se conserva una modulacion en la estructura de la multicapa a pesar de las reacciones de estado solido que se producen en las interfases. – las muestras b-deposicion alternada de peliculas delgadas de hierro y silicio en ultra-alto vacio, con ritmos lentos de evaporacion-estan formadas por una pelicula amorfa de fe3si (b1) y fe2si (b2). – superredes de co-cu c1 y c2: el cobalto cristaliza en una estructura fcc distorsionada con parametros de red a=3.60+-0.01 a y c=3.43+-0.01a. las medidas magneticas se han realizado mediante un magnetometro squid. estos son los resultados de las medidas de relajaciones magneticas: – muestra b1-fe3si\/si(100)-: su viscosidad muestra un comportamiento estrictamente termico (lineal con la temperatura). – muestra c1 -(8 mc cu\/6 mc co)62\/cu(100)-: la viscosidad magnetica tiene un minimo (en valor absoluto) muy pronunciado a t=6k, para crecer bruscamente para temperaturas menores. – muestra c2-(5 mc cu\/9 mc co)103\/cu(100)-:la viscosidad se hace casi constant<\/p>\n

 <\/p>\n

Datos acad\u00e9micos de la tesis doctoral \u00abMedidas de relajaciones magneticas en peliculas delgadas y multicapas.<\/strong>\u00ab<\/h3>\n
    \n
  • T\u00edtulo de la tesis:<\/strong>\u00a0 Medidas de relajaciones magneticas en peliculas delgadas y multicapas. <\/li>\n
  • Autor:<\/strong>\u00a0 Martinez Albertos Bofarull Jos\u00e9 Luis <\/li>\n
  • Universidad:<\/strong>\u00a0 Aut\u00f3noma de Madrid<\/li>\n
  • Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1997<\/li>\n<\/ul>\n

     <\/p>\n

    Direcci\u00f3n y tribunal<\/h3>\n
      \n
    • Director de la tesis<\/strong>\n
        \n
      • Rodolfo Miranda Soriano<\/li>\n<\/ul>\n<\/li>\n
      • Tribunal<\/strong>\n
          \n
        • Presidente del tribunal: Sebasti\u00e1n Vieira D\u00edaz <\/li>\n
        • Vicente Madurga P\u00e9rez (vocal)<\/li>\n
        • Antonio Hernando Grande (vocal)<\/li>\n
        • Javier Tejada Palacios (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

           <\/p>\n","protected":false},"excerpt":{"rendered":"

          Tesis doctoral de Martinez Albertos Bofarull Jos\u00e9 Luis En esta tesis se han analizado los procesos de relajacion magnetica de […]<\/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":[199,1008,1007,8294],"tags":[5484,19129,87916,6068,15317,20567],"class_list":["post-31587","post","type-post","status-publish","format-standard","hentry","category-fisica","category-fisica-del-estado-solido","category-propiedades-magneticas-de-los-solidos","category-superficies","tag-antonio-hernando-grande","tag-javier-tejada-palacios","tag-Martinez-albertos-bofarull-jose-luis","tag-rodolfo-miranda-soriano","tag-sebastian-vieira-diaz","tag-vicente-madurga-perez"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/31587","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=31587"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/31587\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=31587"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=31587"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=31587"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}