{"id":81771,"date":"2018-03-10T00:05:41","date_gmt":"2018-03-10T00:05:41","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/nanohilos-y-microtubos-magneticos-fabricados-por-electrodeposicion-y-caracterizados-mediante-microscopia-de-fuerzas-magneticas\/"},"modified":"2018-03-10T00:05:41","modified_gmt":"2018-03-10T00:05:41","slug":"nanohilos-y-microtubos-magneticos-fabricados-por-electrodeposicion-y-caracterizados-mediante-microscopia-de-fuerzas-magneticas","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/nanohilos-y-microtubos-magneticos-fabricados-por-electrodeposicion-y-caracterizados-mediante-microscopia-de-fuerzas-magneticas\/","title":{"rendered":"Nanohilos y microtubos magneticos fabricados por electrodeposici\u00f3n y caracterizados mediante microscopia de fuerzas magneticas."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Jos\u00e9 Miguel Garcia Martin <\/strong><\/h2>\n<p>En esta tesis se describe la fabricaci\u00f3n, por m\u00e9todos electroqu\u00edmicos, de dos tipos de materiales magn\u00e9ticos: nanohilos de cobalto crecidos en el interior de membranas poosas, y microtubos de cobalto-f\u00f3sfor depositados sobre substratos cil\u00edndricos de cobre. Adem\u00e1s de caracterizar las muestras por t\u00e9cnicas convencionales (difracci\u00f3n de rayos x, microscop\u00eda electr\u00f3nica de barrido, magnet\u00f3metros de inducci\u00f3ny de muestra vibrante), se hace un estudio sistem\u00e1tico de su estructura de dominios mediante microscop\u00eda de fuerzas magn\u00e9ticas mfm.  en el caso de los nanohilos, se comprueba que el crecimiento depende de la membrana empleada: los hilos crecen con estructura c\u00fabica si la membrana es de al\u00famina, y lo hacen con estructura hexagonal cuando es de policarbonato. los conjuntos de nanohilos conmembrana (hilos paralelos) presentan campos de saturaci\u00f3nd el orden de 10.000 oe y campos coercitivos de unos 100oe. por mfm hemos visualizado la es tructura multidomino de un nanohilio de 90 nm de di\u00e1metro.  por su parte, los microtubos de cobalto-f\u00f3sforo poseen estructura amorfa y una anisotrop\u00eda magn\u00e9tica radial debida al crecimiento columnar sobre le substrato cil\u00edndrico de cobre. Los microtubos presentan efecto de mangetoimpedancia gigante (gmi), efecto que aumenta con el espesor de la capa magn\u00e9tica y con la frecuencia de la correinte alterna. Estos resutlados se explican empleando el modelo que considera la exstencia de efecto pelicular. Del an\u00e1lisis por mfm se deduce que los tubos poseen e una estructura de kittel con dominios de ciere, estructua que evoluciona a medida que aumenta el espesor de la capa magn\u00e9tica; los dominos principales se ondulan y los dominios de cierre aumentan de tama\u00f1o.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Nanohilos y microtubos magneticos fabricados por electrodeposici\u00f3n y caracterizados mediante microscopia de fuerzas magneticas.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Nanohilos y microtubos magneticos fabricados por electrodeposici\u00f3n y caracterizados mediante microscopia de fuerzas magneticas. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Jos\u00e9 Miguel Garcia Martin <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 17\/12\/1999<\/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>Manuel V\u00e1zquez Villalabeitia<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Antonio Hernando grande <\/li>\n<li>eduardo Ruiz hitzky (vocal)<\/li>\n<li>arturo Baro vidal (vocal)<\/li>\n<li>Manuel ricardo Ibarra garcia (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Jos\u00e9 Miguel Garcia Martin En esta tesis se describe la fabricaci\u00f3n, por m\u00e9todos electroqu\u00edmicos, de dos tipos [&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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