{"id":136425,"date":"1997-01-01T00:00:00","date_gmt":"1997-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/resonancias-magneticas-de-centros-de-niquel-y-manganeso-en-fluoroperovskitas\/"},"modified":"1997-01-01T00:00:00","modified_gmt":"1997-01-01T00:00:00","slug":"resonancias-magneticas-de-centros-de-niquel-y-manganeso-en-fluoroperovskitas","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/resonancias-magneticas-de-centros-de-niquel-y-manganeso-en-fluoroperovskitas\/","title":{"rendered":"Resonancias magneticas de centros de niquel y manganeso en fluoroperovskitas."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Fernando Lahoz Zamarro <\/strong><\/h2>\n<p>En esta tesis doctoral se presenta un estudio de las se\u00f1ales de resonancias magneticas de distintos centros de niquel y manganeso en cristales del tipo rb1-xcsxcaf3 y rb1-xcexcddf3 donde x varia de 0 a 1. Asimismo se completa el estudio con el analisis de medidas de dilatacion termica realizadas en algunos cristales.  el cristal rbcaf3 sufre una transicion de fase estructural (tfe) de simetria tetragonal a ortorrombica a una temperatura de unos 40k y presenta dependencia con la muestra que se esta midiendo. En este trabajo se muestra un estudio detallado de dicha transicion mediante la tecnica de epr de centros de ni+, ni2+ y ni3+.  tambien se estudian los espectros de epr de los centros de ni+ en la familia de cristales mezclados rb1-xcsxcaf3, centrandose en la influencia de la mezcla en los mismos.  se ha realizado una simulacion de los espectros de ni+ como superposicion de las se\u00f1ales debidas a distintos centros asociados a la sustitucion rb-cs.  respecto a los centros de mn2+, se ha realizado un estudio de la se\u00f1al de endor resolviendose la procedente de los fluores de primera y segunda capa. Esto ha permitido un estudio de la tfe de simetria cubica a tetragonal en el cristal rbcaf3.  tambien se ha determinado la influencia de la conValencia del mn2+ y los fluores de segunda capa a traves del cd para explicar el angulo de giro de dichos fluores en el cristal rbcdf3:mn2+.  mediante medidas de endor y doble endor de mn2+ en cristales de la familia rb1-xcsxcdf3 se ha podido resolver la se\u00f1al de centros asociados a la mezcla, proponiendo un modelo para los mismos.  por ultimo se ha llevado a cabo un estudio comparativo de las tfe que experimentan algunos de los cristales de la familia rb1-xcsxcaf3, utilizando tecnicas de dilatacion termica, asi como de epr en diferentes centros de niquel.  se han obtenido datos sobre las temperaturas criticas, el caracter de la transicion y los exponentes criticos de las mismas.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Resonancias magneticas de centros de niquel y manganeso en fluoroperovskitas.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Resonancias magneticas de centros de niquel y manganeso en fluoroperovskitas. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Fernando Lahoz Zamarro <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Zaragoza<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/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>Rafael Alcala Aranda<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Fernando Agullo Lopez <\/li>\n<li>Victor Orera Clemente (vocal)<\/li>\n<li>Miguel Moreno Mas (vocal)<\/li>\n<li> Alonso Gasc\u00f3n Pablo J. (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Fernando Lahoz Zamarro En esta tesis doctoral se presenta un estudio de las se\u00f1ales de resonancias magneticas [&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":[199,1008,4709,560,28867,13610],"tags":[28870,3658,250849,1277,44772,24618],"class_list":["post-136425","post","type-post","status-publish","format-standard","hentry","category-fisica","category-fisica-del-estado-solido","category-fotoquimica","category-quimica-fisica","category-resonancia-magnetica","category-zaragoza","tag-alonso-gascon-pablo-j","tag-fernando-agullo-lopez","tag-fernando-lahoz-zamarro","tag-miguel-moreno-mas","tag-rafael-alcala-aranda","tag-victor-orera-clemente"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/136425","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=136425"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/136425\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=136425"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=136425"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=136425"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}