{"id":33226,"date":"1997-07-11T00:00:00","date_gmt":"1997-07-11T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/aportaciones-al-estudio-de-la-resonancia-magnetica-en-ferritas-de-manganeso\/"},"modified":"1997-07-11T00:00:00","modified_gmt":"1997-07-11T00:00:00","slug":"aportaciones-al-estudio-de-la-resonancia-magnetica-en-ferritas-de-manganeso","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/aportaciones-al-estudio-de-la-resonancia-magnetica-en-ferritas-de-manganeso\/","title":{"rendered":"Aportaciones al estudio de la resonancia magnetica en ferritas de manganeso"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Ana Garcia Flores <\/strong><\/h2>\n<p>Se ha fabricado un conjunto de muestras policristalinas de ferritas de manganeso de diferentes composiciones y bajo distintas condiciones de temperatura, tiempo y atm\u00f3sfera de sinterizaci\u00f3n. Se ha dise\u00f1ado y puesto a punto un nuevo sistema de medida de la resonancia ferrimagn\u00e9tica basado en una cavidad cil\u00edndrica con la posibilidad de medir en temperatura desde 77k a 300k. Se ha realizado un an\u00e1lisis previo de las muestras por medio de estudios termogravim\u00e9tricos, difracci\u00f3n de rayos x y medidas de densidad. Se ha propuesto una teor\u00eda que, generalizando el formalismo conocido, permite justificar el fen\u00f3meno de resonancia ferrimagn\u00e9tica en ferritas en las que 4 ms resulte mayor que el campo magn\u00e9tico aplicado a la frecuencia de trabajo. Esta teor\u00eda estudia los mecanismos de relajaci\u00f3n del modo uniforme de la resonancia ferrimagn\u00e9tica. A partir del an\u00e1lisis de las contribuciones al ancho de l\u00ednea se ha llegado al esclarecimiento de la distribuci\u00f3n de cationes en las posiciones octa\u00e9dricas en las ferritas de manganeso. Se han realizado medidas de conductividad a.C. Encontr\u00e1ndose en estas t\u00e9cnicas una posible v\u00eda para la localizaci\u00f3n de distintas fases en los materiales magn\u00e9ticos. Se han realizado medidas de magnetizaci\u00f3n cuyos resultados han sido utilizados en todos los ajustes de la resonancia magn\u00e9tica. Se ha encontrado que los mecanismos de relajaci\u00f3n de la fase paramagn\u00e9tica est\u00e1n regidos por la interacci\u00f3n esp\u00edn-red propuesta por el modelo de \u00abexchange-reservoir\u00bb.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Aportaciones al estudio de la resonancia magnetica en ferritas de manganeso<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Aportaciones al estudio de la resonancia magnetica en ferritas de manganeso <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Ana Garcia Flores <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Salamanca<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 07\/11\/1997<\/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>Luis Torres Rincon<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: jose Rivas rey <\/li>\n<li>agustin del Moral (vocal)<\/li>\n<li>Manuel Vazquez (vocal)<\/li>\n<li>Carlos de Francisco garrido (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Ana Garcia Flores Se ha fabricado un conjunto de muestras policristalinas de ferritas de manganeso de diferentes [&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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