{"id":22109,"date":"2018-03-09T09:12:09","date_gmt":"2018-03-09T09:12:09","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/contribucion-al-estudio-del-transporte-electrico-en-capas-delgadas-de-cupratos-superconductores-corrientes-supercra%c2%adticas-y-paraconductividad\/"},"modified":"2018-03-09T09:12:09","modified_gmt":"2018-03-09T09:12:09","slug":"contribucion-al-estudio-del-transporte-electrico-en-capas-delgadas-de-cupratos-superconductores-corrientes-supercra%c2%adticas-y-paraconductividad","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/contribucion-al-estudio-del-transporte-electrico-en-capas-delgadas-de-cupratos-superconductores-corrientes-supercra%c2%adticas-y-paraconductividad\/","title":{"rendered":"Contribuci\u00f3n al estudio del transporte el\u00e9ctrico en capas delgadas de cupratos superconductores: corrientes supercr\u00edticas y paraconductividad"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Vi\u00f1a Rebolledo Jos\u00e9 M. <\/strong><\/h2>\n<p>En superconductores de tipo ii se observa experimentalmente una ruptura brusca del estado mixto si la densidad de corriente aplicada supera un cierto valor j*. Esta densidad de corriente puede ser hasta un orden de magnitud mayor que el valor de la corriente cr\u00edtica jc en que empieza a medirse alguna disipaci\u00f3n, dentro del estado mixto. Se induce en j* una transici\u00f3n abrupta de toda la muestra al estado normal (en tiempo inferior a diez microsegundos, la resoluci\u00f3n temporal de nuestros dispositivos). as\u00ed como en buenas muestras el origen f\u00edsico de jc est\u00e1 claramente vinculado al desanclaje y movimiento de los v\u00f3rtices magn\u00e9ticos, no est\u00e1 tan claro qu\u00e9 mecanismos induce el fen\u00f3meno observado en j*.  en nuestro estudio hemos empleado micropuentes grabados sobre capas delgadas de y-123 (ybco) depositadas sobre substratos cristalinos de srtio3. este trabajo experimental pretende:  1,- profundizar en las causas de este salto al estado normal haciendo medidas con dispotivos electr\u00f3nicos r\u00e1pidos, que permitan apreciar con cierto detalle los fen\u00f3menos que ocurren torno a j*.  2,- intentar conocer mejor el papel que desempe\u00f1an los v\u00f3rtices magn\u00e9ticos en esta transici\u00f3n, realizando medidas con campos magn\u00e9ticos aplicados bajos, desde del orden del autocampo (t\u00edpicamente 0,01 t) hasta 1 t.  3,- estudiar la influencia de los efectos t\u00e9rmicos. T\u00e9ngase en cuenta que la elevada densidad de corriente inyectada cerca de j* (para nuestras muestras, en torno a 10 7 a\/cm2) generan una considerable disipaci\u00f3n de calor.  en este trabajo propondremos un modelo simplificado para describir la evoluci\u00f3n t\u00e9rmica de nuestras muestras basado en conceptos muy elementales. este modelo nos permitir\u00e1 mostrar que los procesos t\u00e9rmicos que tienen lugar a altas densidades de corriente podr\u00edan explicar, incluso cuantitativamente, algunos de los aspectos esenciales del comportamiento el\u00e9ctrico de estas muestras en las cercan\u00edas de j*. Permi<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Contribuci\u00f3n al estudio del transporte el\u00e9ctrico en capas delgadas de cupratos superconductores: corrientes supercr\u00edticas y paraconductividad<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Contribuci\u00f3n al estudio del transporte el\u00e9ctrico en capas delgadas de cupratos superconductores: corrientes supercr\u00edticas y paraconductividad <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Vi\u00f1a Rebolledo Jos\u00e9 M. <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Santiago de compostela<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 17\/03\/2003<\/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>F\u00e9lix Vidal Costa<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: maurice-xavier Fran\u00ed\u00a7ois <\/li>\n<li>Rafael Navarro linares (vocal)<\/li>\n<li>jean-paul Maneval (vocal)<\/li>\n<li> Vicent l\u00f3pez Jos\u00e9 Luis (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Vi\u00f1a Rebolledo Jos\u00e9 M. En superconductores de tipo ii se observa experimentalmente una ruptura brusca del estado [&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 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":[987,199,1008,977,9912,5437],"tags":[2789,66286,66285,18125,4905,66284],"class_list":["post-22109","post","type-post","status-publish","format-standard","hentry","category-electromagnetismo","category-fisica","category-fisica-del-estado-solido","category-santiago-de-compostela","category-superconductividad","category-superconductores","tag-felix-vidal-costa","tag-jean-paul-maneval","tag-maurice-xavier-franiois","tag-rafael-navarro-linares","tag-vicent-lopez-jose-luis","tag-vina-rebolledo-jose-m"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/22109","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=22109"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/22109\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=22109"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=22109"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=22109"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}