{"id":34538,"date":"1998-01-01T00:00:00","date_gmt":"1998-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/influencia-del-orden-desorden-en-las-propiedades-magneticas-y-estructurales-de-la-aleacion-fe-rh\/"},"modified":"1998-01-01T00:00:00","modified_gmt":"1998-01-01T00:00:00","slug":"influencia-del-orden-desorden-en-las-propiedades-magneticas-y-estructurales-de-la-aleacion-fe-rh","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/influencia-del-orden-desorden-en-las-propiedades-magneticas-y-estructurales-de-la-aleacion-fe-rh\/","title":{"rendered":"Influencia del orden-desorden en las propiedades magneticas y estructurales de la aleacion fe-rh."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Elena Navarro Palma <\/strong><\/h2>\n<p>Este trabajo tiene por objeto caracterizar las propiedades magn\u00e9ticas y estructurales, tanto de las fases del equilibrio, como de las fases nanocristalinas obtenidas mediante la t\u00e9cnica de aleado mec\u00e1nico, de distintas composiciones de la aleaci\u00f3n fe-rh. Para ello se han seleccionado las siguientes composiciones:  fe0.65rh0.35 ferromagn\u00e9tica y con estructura bcc-ordenada tipo clcs; fe0.5rh0.5 antiferromagn\u00e9tica con la misma estructura bcc-ordenada; fe0.4rh0.6 se encuentra en la zona de coexistencia de las fases antiferromagn\u00e9tica y fcc-paramagn\u00e9tica; y fe0.28rh0.72 y fe0.26rh0.74 paramagn\u00e9ticas con estructura fcc.  se ha estudiado con detalle la transici\u00f3n antiferro-ferro en la composici\u00f3n fe0.5rh0.5 y en composiciones cercanas a la equiat\u00f3mica.  en las fases nanocristalinas obtenidas mediante la t\u00e9cnica de aleado mec\u00e1nico, a bajas temperaturas se ha encontrado en todas las composiciones las siguientes propiedades: un m\u00e1ximo a una cierta temperatura, tm, en la dependencia t\u00e9rmica de las medidas de la susceptibilidad alterna y de la imanaci\u00f3n medida sin campo de enfriamiento (zfc), una ancha distribuci\u00f3n de campos hiperfinos en los espectros mossbauer, una clara dependencia del tiempo de espera antes de modificar las condiciones del campo para temperaturas t&lt;tm&#8230;. Un estudio sistem\u00e1tico de las propiedades est\u00e1ticas y din\u00e1micas de las distintas composiciones a baja temperatura nos ha obligado a descartar las hip\u00f3tesis de que la causa que da origen a estos efectos se deba a un comportamiento superparamagn\u00e9tico en los nanogranos o a la existencia de una verdadera transici\u00f3n de fase hacia un estado vidrio d esp\u00edn. El desplazamiento de los ciclos de hist\u00e9resis medidos a t&lt;tm y con campo aplicado apuntan a que son las fronteras de los nanogranos las que se comportan como un vidrio de esp\u00edn.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Influencia del orden-desorden en las propiedades magneticas y estructurales de la aleacion fe-rh.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Influencia del orden-desorden en las propiedades magneticas y estructurales de la aleacion fe-rh. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Elena Navarro Palma <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1998<\/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: Juan  Manuel Rojo  Alaminos <\/li>\n<li>Manuel Ricardo Ibarra Garcia (vocal)<\/li>\n<li>Agustin Del Moral Gamiz (vocal)<\/li>\n<li>Jes\u00fas Mar\u00eda Gonzalez  Fernandez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Elena Navarro Palma Este trabajo tiene por objeto caracterizar las propiedades magn\u00e9ticas y estructurales, tanto de las [&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":[987,199,1008,740,1007],"tags":[1010,5484,93107,93108,5456,26297],"class_list":["post-34538","post","type-post","status-publish","format-standard","hentry","category-electromagnetismo","category-fisica","category-fisica-del-estado-solido","category-magnetismo","category-propiedades-magneticas-de-los-solidos","tag-agustin-del-moral-gamiz","tag-antonio-hernando-grande","tag-elena-navarro-palma","tag-jesus-maria-gonzalez-fernandez","tag-juan-manuel-rojo-alaminos","tag-manuel-ricardo-ibarra-garcia"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/34538","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=34538"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/34538\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=34538"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=34538"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=34538"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}