{"id":139685,"date":"2026-01-12T17:47:54","date_gmt":"2026-01-12T17:47:54","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/estudio-espectroscopico-de-cristales-nh4cl1-xbrx-impurificados-influencia-de-las-transiciones-de-fase\/"},"modified":"2026-01-12T17:47:54","modified_gmt":"2026-01-12T17:47:54","slug":"estudio-espectroscopico-de-cristales-nh4cl1-xbrx-impurificados-influencia-de-las-transiciones-de-fase","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/estudio-espectroscopico-de-cristales-nh4cl1-xbrx-impurificados-influencia-de-las-transiciones-de-fase\/","title":{"rendered":"Estudio espectroscopico de cristales nh4cl1-xbrx impurificados: influencia de las transiciones de fase."},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Gomez Bre\u00f1osa Ana M. <\/strong><\/h2>\n<p>En esta memoria se estudian las transiciones de fase (tf) de los cristales nh4cl1-xbrx (x mayor o igual que 0 y menor o igual a 1) a traves de tecnicas espectroscopicas, empleando impurezas como sonda. Hemos prestado especial atencion a los efectos de relajacion local en torno a la impureza, provocados por dichas transiciones.  los complejos estudiados son nh4cl1-xbrx:cu2+(ii) y nh4cl:cu2+(i) y nh4cl:pb2+.  hemos puesto de manifiesto un caso en el que las variaciones de distancia metal-ligando no siguen a la red, confirmando el modelo propuesto de relajacion anomala, en la transicion de fase beta-delta del nh4cl por medio de cinco parametros espectroscopicos.  asimismo, la mayor sensibilidad de las bandas de transferencia de carga frente a las de campo cristalino para detectar tf y la utilidad de las tecnicas espectroscopicas para medir variaciones de distancia metal-ligando, ya que a traves de estas se mejoran los obtenidos por exafs.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Estudio espectroscopico de cristales nh4cl1-xbrx impurificados: influencia de las transiciones de fase.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Estudio espectroscopico de cristales nh4cl1-xbrx impurificados: influencia de las transiciones de fase. <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Gomez Bre\u00f1osa Ana M. <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Cantabria<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1992<\/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>Miguel Moreno Mas<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Rafael Alcala Aranda <\/li>\n<li>Victor Orera Clemente (vocal)<\/li>\n<li>Martin Spaeth Johan (vocal)<\/li>\n<li> Perez Mato Jos\u00e9 Manuel (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Gomez Bre\u00f1osa Ana M. En esta memoria se estudian las transiciones de fase (tf) de los cristales [&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":[10518,199,1008,14996,1605],"tags":[254209,254210,1277,254211,44772,24618],"class_list":["post-139685","post","type-post","status-publish","format-standard","hentry","category-cantabria","category-fisica","category-fisica-del-estado-solido","category-imperfecciones","category-propiedades-opticas-de-los-solidos","tag-gomez-brenosa-ana-m","tag-martin-spaeth-johan","tag-miguel-moreno-mas","tag-perez-mato-jose-manuel","tag-rafael-alcala-aranda","tag-victor-orera-clemente"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/139685","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=139685"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/139685\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=139685"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=139685"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=139685"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}