{"id":143069,"date":"1993-01-01T00:00:00","date_gmt":"1993-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/influencia-de-la-estructura-en-los-procesos-de-imanacion-de-aleaciones-nanocristalinas-ricas-en-hierro\/"},"modified":"1993-01-01T00:00:00","modified_gmt":"1993-01-01T00:00:00","slug":"influencia-de-la-estructura-en-los-procesos-de-imanacion-de-aleaciones-nanocristalinas-ricas-en-hierro","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/influencia-de-la-estructura-en-los-procesos-de-imanacion-de-aleaciones-nanocristalinas-ricas-en-hierro\/","title":{"rendered":"Influencia de la estructura en los procesos de imanacion de aleaciones nanocristalinas ricas en hierro."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Eladia Pulido Arroyo <\/strong><\/h2>\n<p>\u00ab\u00bbla memoria presentada consiste, esencialmente, en el estudio de la influencia de la estructura en el comportamiento magnetico de aleaciones nanocristalinas.  se estudiaron las aleaciones de composicion fe-si-b, con peque\u00f1as cantidades de cu y nb, en estado amorfo y tras diferentes tratamientos termicos con los que se cambiaban el estado de cristalizacion (tama\u00f1o de grano, fases cristalinas presentes, etc.). La caracterizacion estructural se realizo por medio de difraccion de rayos x y electrones, microscopia electronica de transmision, calorimetria diferencial de barrido y espectroscopia mossbauer. A su vez, se caracterizaron magneticamente las muestras tanto a temperatura ambiente mediante el estudio de los ciclos de histeresis, anisotropia macroscopica y magnetostriccion, como a baja temperatura (entre 4 y 300 k) con la medida de los coeficientes de la ley de aproximacion a la saturacion y el estudio de la variacion de la imanacion de saturacion con la temperatura (ondas de spin). La consecuencia mas original y relevante extraida de los estudios anteriormente rese\u00f1ados es que el endurecimiento que el material sufre a partir de una temperatura de recocido dada, es causado por la precipitacion de una segunda fase cristalina de fe-b de alta anisotropia junto con la aparicion de una fase paramagnetica que rodea y aisla magneticamente a los granos de fe-si.\u00f1<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Influencia de la estructura en los procesos de imanacion de aleaciones nanocristalinas ricas en hierro.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Influencia de la estructura en los procesos de imanacion de aleaciones nanocristalinas ricas en hierro. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Eladia Pulido Arroyo <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1993<\/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>Antonio Hernando Grande<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Salvador Velayos Hermida <\/li>\n<li>Jos\u00e9 Gomez Sal (vocal)<\/li>\n<li>Domingo Gonzalez Alvarez (vocal)<\/li>\n<li> Riveiro Corona Jos\u00e9 Manuel (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Eladia Pulido Arroyo \u00ab\u00bbla memoria presentada consiste, esencialmente, en el estudio de la influencia de la estructura [&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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