{"id":5375,"date":"1995-01-01T00:00:00","date_gmt":"1995-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/1995\/01\/01\/construccion-y-primeras-aplicaciones-de-un-sistema-inductivo-para-medir-corrientes-criticas-en-los-superconductores-de-alta-tc\/"},"modified":"1995-01-01T00:00:00","modified_gmt":"1995-01-01T00:00:00","slug":"construccion-y-primeras-aplicaciones-de-un-sistema-inductivo-para-medir-corrientes-criticas-en-los-superconductores-de-alta-tc","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/construccion-y-primeras-aplicaciones-de-un-sistema-inductivo-para-medir-corrientes-criticas-en-los-superconductores-de-alta-tc\/","title":{"rendered":"Construccion y primeras aplicaciones de un sistema inductivo para medir corrientes criticas en los superconductores de alta tc."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Gerardo Domarco Alvarez <\/strong><\/h2>\n<p>Se ha construido un dispositivo, basado en el principio del transformador, para medir sin necesidad de contactos electricos la corriente critica, jc, de muestras superconductoras. Con este dispositivo la corriente critica puede ser medida con mucha mayor resolucion que con las tecnicas convencionales de cuatro hilos y sin los inconvenientes asociados al calentamiento joule que puede aparecer en los contactos entre los hilos de corriente y los superconductores.  este dispositivo, minuciosamente calibrado, ha sido utilizado para medir la corriente critica de diversas muestras policristalinas de oxido de cobre superconductoras a altas temperaturas (htsc) de las familias yba2cu3o7-e y bi1.5pb0.5ca2sr2cu30 desde la temperatura del nitrogeno liquido hasta la temperatura de transicion.  por otra parte se ha medido tambien la resistividad electrica por el metodo convencional de cuatro hilos sobre las mismas muestras y extraido la resistividad media intergrano, pct, de las distintas muestras. De la comparacion de los valores de pct y jc se ha deducido que el producto pct jc es, para la mayoria de las muestras granulares estudiadas, una funcion \u00abuniversal\u00bb (para cada familia de oxidos de cobre) independiente de la muestra y que solo depende de la temperatura. Este resultado permite asi hacer una estimacion fiable de las corrientes criticas de materiales ceramicos (granulares) de oxidos de cobre superconductores a partir, simplemente, de medidas de la resistividad electrica en el estado normal.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Construccion y primeras aplicaciones de un sistema inductivo para medir corrientes criticas en los superconductores de alta tc.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Construccion y primeras aplicaciones de un sistema inductivo para medir corrientes criticas en los superconductores de alta tc. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Gerardo Domarco Alvarez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Santiago de compostela<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1995<\/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>Felix Vidal Costa<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Sebastian Vieira <\/li>\n<li>Conrado Rillo  Millan (vocal)<\/li>\n<li>Raul Villar (vocal)<\/li>\n<li>Luis Alvarez Jose (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Gerardo Domarco Alvarez Se ha construido un dispositivo, basado en el principio del transformador, para medir sin [&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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