{"id":16932,"date":"2018-03-09T09:04:46","date_gmt":"2018-03-09T09:04:46","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/magnetotransporte-en-nanoparta%c2%adculas-de-la2-3ca1-3mno3\/"},"modified":"2018-03-09T09:04:46","modified_gmt":"2018-03-09T09:04:46","slug":"magnetotransporte-en-nanoparta%c2%adculas-de-la2-3ca1-3mno3","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/magnetotransporte-en-nanoparta%c2%adculas-de-la2-3ca1-3mno3\/","title":{"rendered":"Magnetotransporte en nanopart\u00edculas de la2\/3ca1\/3mno3"},"content":{"rendered":"

Tesis doctoral de Luis Eduardo Hueso Arroyo <\/strong><\/h2>\n

Las manganitas, o \u00f3xidos mixtos de manganeso, se vienen estudiando sistem\u00e1ticamente desde hace m\u00e1s de diez a\u00f1os como consecuencia de sus propiedades de magnetorresistencia, tanto magnetorresistencia intr\u00ednseca (llamada colosal) o extr\u00ednseca, creada por defectos microestructurales. el objetivo de este trabajo es el de estudiar muestras de una manganita ferromagn\u00e9tica t\u00edpica (la2\/3ca1\/3mno3), pero con tama\u00f1o de part\u00edcula en el rango nanom\u00e9trico, con el prop\u00f3sito de aumentar las contribuciones superficiales y as\u00ed, posiblemente, los fen\u00f3menos de magnetorresistencia intergranular. por medio de un m\u00e9todo de qu\u00edmica suave (m\u00e9todo sol-gel), conseguimos un control del tama\u00f1o de part\u00edcula entre 40 y 500 nm. Posteriormente se realilz\u00f3 una caracterizaci\u00f3n de las propiedades magn\u00e9tivas y de transporte el\u00e9ctrico de las muestras. los resultados obtenidos m\u00e1s rese\u00f1ables son: – determinaci\u00f3n de una capa superficial no magn\u00e9tica en la superficie de las part\u00edculas. – establecimiento del car\u00e1cter monodomino magn\u00e9tico en las muestras menores de 100nm. – c\u00e1lclulo de la anisotrop\u00eda magn\u00e9tica y su variaci\u00f3n con el tama\u00f1o de part\u00edcula. – modelizaci\u00f3n de la resistividad el\u00e9ctrica, previendo el descenso de la temperatura de transici\u00f3n metal-aislante con el tama\u00f1o de part\u00edcula. – desaparici\u00f3n progresiva de la magnetorresistencia intr\u00ednseca al mismo tiempo que se incremente la contribuci\u00f3n extr\u00ednseca al disminuir el tama\u00f1o de part\u00edcula. – descubrimiento y modelizaci\u00f3n del bloqueo electrost\u00e1tico entre part\u00edculas a bajas temperaturas. – incremento de los valores de magnetorresistencia en muestras compuestas manganita + al\u00famina.<\/p>\n

 <\/p>\n

Datos acad\u00e9micos de la tesis doctoral \u00abMagnetotransporte en nanopart\u00edculas de la2\/3ca1\/3mno3<\/strong>\u00ab<\/h3>\n
    \n
  • T\u00edtulo de la tesis:<\/strong>\u00a0 Magnetotransporte en nanopart\u00edculas de la2\/3ca1\/3mno3 <\/li>\n
  • Autor:<\/strong>\u00a0 Luis Eduardo Hueso Arroyo <\/li>\n
  • Universidad:<\/strong>\u00a0 Santiago de compostela<\/li>\n
  • Fecha de lectura de la tesis:<\/strong>\u00a0 20\/05\/2002<\/li>\n<\/ul>\n

     <\/p>\n

    Direcci\u00f3n y tribunal<\/h3>\n
      \n
    • Director de la tesis<\/strong>\n
        \n
      • Jose Rivas Rey<\/li>\n<\/ul>\n<\/li>\n
      • Tribunal<\/strong>\n
          \n
        • Presidente del tribunal: fernando Briones fernandez pola <\/li>\n
        • Mar\u00eda antonia Se\u00f1ar\u00eds rodr\u00edguez (vocal)<\/li>\n
        • Jos\u00e9 Luis Martinez pe\u00f1a (vocal)<\/li>\n
        • De teresa nogueras Jos\u00e9 Mar\u00eda (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

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

          Tesis doctoral de Luis Eduardo Hueso Arroyo Las manganitas, o \u00f3xidos mixtos de manganeso, se vienen estudiando sistem\u00e1ticamente desde hace […]<\/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":[332,199,1008,14406,1125,1007,977,1126],"tags":[40752,5457,1011,2493,53237,53238],"class_list":["post-16932","post","type-post","status-publish","format-standard","hentry","category-ciencias-tecnologicas","category-fisica","category-fisica-del-estado-solido","category-materiales-ceramicos","category-propiedades-de-materiales","category-propiedades-magneticas-de-los-solidos","category-santiago-de-compostela","category-tecnologia-de-materiales","tag-de-teresa-nogueras-jose-maria","tag-fernando-briones-fernandez-pola","tag-jose-luis-Martinez-pena","tag-jose-rivas-rey","tag-luis-eduardo-hueso-arroyo","tag-maria-antonia-senaris-rodriguez"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/16932","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=16932"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/16932\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=16932"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=16932"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=16932"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}