{"id":78389,"date":"2018-03-09T23:24:02","date_gmt":"2018-03-09T23:24:02","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/ballistic-magnetoresistance-in-the-nanoconstrictions\/"},"modified":"2018-03-09T23:24:02","modified_gmt":"2018-03-09T23:24:02","slug":"ballistic-magnetoresistance-in-the-nanoconstrictions","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/ballistic-magnetoresistance-in-the-nanoconstrictions\/","title":{"rendered":"Ballistic magnetoresistance in the nanoconstrictions"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Hao Cheng <\/strong><\/h2>\n<p>La spintr\u00f3nica es un \u00e1rea de investigaci\u00f3n de reciente aparici\u00f3n que se ocupa del desarrollo de una clase nueva de dispositivos, los dispositivos spintr\u00f3nicos. Los dispositivos spintr\u00f3nicos se basan en efectos magnetorresistivos(mr), variaciones de la resistencia el\u00e9ctrica en presencia de campos magn\u00e9ticos variables, que queden ser descritos en terminos de modelos de transporte electr\u00f3nico dependiente del spin. La magnetorresistencia que se denomina bal\u00edstica(mrb) fue observada en nanocontactos de materiales ferromagn\u00e9ticos a temperatura ambiente y en presencia  de camposa magneticos relativamente peque\u00f1os por el professor nicol\u00e1s garc\u00eda en 1999. El descubrimiento de la magnetorresistencia bal\u00edstica (mrb) ofrece buenas posibilidades para aplicaci\u00f3n en los dispositivos de nueva generaci\u00f3n. La elevada sensibilidad del efecto mrb, muy superior a la observada para el efecto de magnetorresistencia gigante(mrg), es muy adecuada para la fabricaci\u00f3n de cabezas lectoras para sistemas de ultra &#8211; alta densidad de almacenamiento de informaci\u00f3n.  esta tesis presenta el estudio experimental sistem\u00e1tico de las propiedades de magnetotransporte en nanocontactos de diferentes materiales y configuraciones. estos experimentos nos muestran que los cambios de resistencia de los nanocontactos cambian con los campos magn\u00e9ticos aplicados son efectos de magnetorresistencia bal\u00edstica(mrb). Para aplicar los dispositivos basados en el efecto mrb, se han fabricadpo nanoconstricciones de permalloy de 30nm de anchura sobre superficies de silicio mediante litograf\u00eda electr\u00f3nica.  en el capitulo 1, se describen brevemente los distintos tipos de sistemas magnetoresistivos que se han encontrado hasta ahora; los conceptos de nanotecnolog\u00eda y el arquetipo de dispositivos basados en la electr\u00f3nica de spin han sido descritos tambi\u00e9n.  el efecto de la magnetorresistencia bal\u00edstica (mrb) en nanocontactos fabricados con ruptura controlada de union<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Ballistic magnetoresistance in the nanoconstrictions<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Ballistic magnetoresistance in the nanoconstrictions <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Hao Cheng <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 24\/01\/2006<\/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>Nicolas Garcia Garcia<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: sebasti\u00e1n Vieira d\u00edaz <\/li>\n<li>arkadi Levanyuk (vocal)<\/li>\n<li>Francisco Guinea l\u00f3pez (vocal)<\/li>\n<li>Manuel V\u00e1zquez villalabeitia (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Hao Cheng La spintr\u00f3nica es un \u00e1rea de investigaci\u00f3n de reciente aparici\u00f3n que se ocupa del desarrollo [&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":[987,199,740],"tags":[51302,14805,168518,5486,58991,15317],"class_list":["post-78389","post","type-post","status-publish","format-standard","hentry","category-electromagnetismo","category-fisica","category-magnetismo","tag-arkadi-levanyuk","tag-francisco-guinea-lopez","tag-hao-cheng","tag-manuel-vazquez-villalabeitia","tag-nicolas-garcia-garcia","tag-sebastian-vieira-diaz"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/78389","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=78389"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/78389\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=78389"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=78389"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=78389"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}