{"id":57218,"date":"2018-03-09T22:45:02","date_gmt":"2018-03-09T22:45:02","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/efectos-de-matriz-y-tamano-en-las-propiedades-magneticas-y-magneto-opticas-de-nanoparticulas-magneticas\/"},"modified":"2018-03-09T22:45:02","modified_gmt":"2018-03-09T22:45:02","slug":"efectos-de-matriz-y-tamano-en-las-propiedades-magneticas-y-magneto-opticas-de-nanoparticulas-magneticas","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica-fisica\/efectos-de-matriz-y-tamano-en-las-propiedades-magneticas-y-magneto-opticas-de-nanoparticulas-magneticas\/","title":{"rendered":"Efectos de matriz y tama\u00f1o en las propiedades magneticas y magneto-opticas de nanoparticulas magneticas."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Cesar Clavero Perez <\/strong><\/h2>\n<p>Contenido agradecimientos &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..Xi cap\u00edtulo 1.- Introducci\u00f3n y motivaci\u00f3n de la tesis 1.1. Introducci\u00f3n y motivaci\u00f3n de la tesis &#8230;.15 1.1.1. Efectos del tama\u00f1o de las nanopart\u00edculas &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.17 1.1.2. Efectos de matriz&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.18 1.1.3. Estrategias para la fabricaci\u00f3n de nanoestructuras: aproximaci\u00f3n ascendente (\u00abbottom-up\u00bb) y descendente (\u00abtop-down\u00bb) &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..19 1.1.4. Modos de crecimiento: auto-ensamblado y auto-organizaci\u00f3n&#8230;&#8230;&#8230;..20 1.1.5. Organizaci\u00f3n de la memoria de tesis&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;22 1.2. Referencias &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;23 cap\u00edtulo 2.- T\u00e9cnicas experimentales 2.1. Introducci\u00f3n &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.29 2.2. T\u00e9cnicas de crecimiento&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.29 2.2.1. Pulverizaci\u00f3n cat\u00f3dica&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;30 2.2.2. Ablaci\u00f3n l\u00e1ser&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.32 2.2.3. Sistemas de crecimiento empleados &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;33 2.2.3.1. Sistema de crecimiento imm &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..33 2.2.3.2. Sistema de crecimiento lln&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;40 2.3. T\u00e9cnicas de caracterizaci\u00f3n estructural&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..41 2.3.1. Difracci\u00f3n de rayos x &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;41 2.3.1.1. Bajo \u00e1ngulo: reflectometr\u00eda xrr &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.45 2.3.1.2. Alto \u00e1ngulo: difracci\u00f3n de rayos x&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..46 2.3.2. Microscop\u00eda electr\u00f3nica de transmisi\u00f3n (tem) &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;48 2.3.3. Microscop\u00edas de barrido de sonda local: stm y afm &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.50 2.3.3.1. Microscop\u00eda de efecto t\u00fanel (stm)&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..50 2.3.3.2. Microscop\u00eda de fuerzas at\u00f3micas (afm) &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.51 2.4. Caracterizaci\u00f3n magneto-\u00f3ptica &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..53 2.4.1. El efecto magneto-\u00f3ptico &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.54 2.4.1.1. Descripci\u00f3n macrosc\u00f3pica del efecto magneto-\u00f3ptico&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..56 2.4.2. Sistema kerr polar&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;60 2.4.2.1. Formulaci\u00f3n \u00f3ptica &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.63 2.4.2.2. Medida de la rotaci\u00f3n kerr&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.67 2.4.2.3. Medida de la elipticidad kerr &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;69 2.4.3. Sistema kerr transversal&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;70 2.5. Referencias &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;72 cap\u00edtulo 3.- Efectos de matriz y tama\u00f1o en nanopart\u00edculas de co embebidas en matriz diel\u00e9ctrica 3.1. Introducci\u00f3n &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.77 3.2. Nanopart\u00edculas de co embebidas en mgo&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.78 contenido viii 3.3. Nanopart\u00edculas de co embebidas en aln&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.. 90 3.4. Nanopart\u00edculas de co embebidas en zro2 &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230; 94 3.5. Conclusiones &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;. 101 3.6. Referencias&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;. 102 cap\u00edtulo 4: efectos de matriz y de morfolog\u00eda en nanopart\u00edculas de co embebidas en matriz met\u00e1lica 4.1. Introducci\u00f3n&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.. 107 4.2. Nanopart\u00edculas de co auto-ensambladas en al2o3 (0001) con matriz de al, au y pt&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.. 108 4.2.1. Sistema co \/ al2o3 (0001)&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230; 108 4.2.2. Efectos de la temperatura de deposici\u00f3n del co y del grado de polarizabilidad de la matriz &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;. 116 4.2.2.1. Morfolog\u00eda: formaci\u00f3n de nanopart\u00edculas&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230; 117 4.2.2.2. Anisotrop\u00eda magn\u00e9tica &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230; 121 4.2.2.3. Efectos de la nanoestructuraci\u00f3n y de matriz en la actividad magneto-\u00f3ptica &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.. 125 4.3. Nanopart\u00edculas de co auto-organizadas sobre au(111) y embebidas en au. &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230; 133 4.3.2. Obtenci\u00f3n de la superficie au(111)&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;. 136 4.3.3. Anisotrop\u00eda magn\u00e9tica&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230; 143 4.3.4. Actividad magneto-\u00f3ptica&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;. 146 4.4. Conclusiones &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;. 149 4.5. Referencias&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;. 149 cap\u00edtulo 5: nanopart\u00edculas de fepd con anisotrop\u00eda magn\u00e9tica perpendicular 5.1. Introducci\u00f3n&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.. 155 5.2. Aleaciones binarias l10 &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.. 156 5.3. Nanopart\u00edculas de fepd en matriz diel\u00e9ctrica: sistema mgo \/ fepd \/ mgo (001) &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230; 163 5.3.1. Influencia de la temperatura de deposici\u00f3n en la estructura y en las propiedades magn\u00e9ticas y magneto-\u00f3pticas&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;. 164 5.3.1.1. Morfolog\u00eda y estructura &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;. 164 5.3.1.2. Anisotrop\u00eda magn\u00e9tica &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230; 169 5.3.1.3. Actividad magneto-\u00f3ptica &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;. 174 5.3.2. Influencia del tama\u00f1o de las nanopart\u00edculas en la estructura y en las propiedades magn\u00e9ticas&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;. 177 5.4. Nanopart\u00edculas de fepd en matriz met\u00e1lica: sistema pd \/ fepd \/ v \/ mgo (001)     efectos de matriz y tama\u00f1o en las propiedades magn\u00e9ticas y magneto-\u00f3pticas de nanopart\u00edculas magn\u00e9ticas   los sistemas de nanopart\u00edculas magn\u00e9ticas embebidas en matrices diel\u00e9ctricas y met\u00e1licas han despertado un gran inter\u00e9s tanto desde el punto de vista de la investigaci\u00f3n fundamental como desde el punto de vista tecnol\u00f3gico. Gran parte de este inter\u00e9s es debido a las novedosas propiedades que presentan, como el aumento del momento magn\u00e9tico por \u00e1tomo, el aumento de la anisotrop\u00eda magn\u00e9tica, la aparici\u00f3n de resonancias de plasm\u00f3n superficial y el aumento de la actividad magneto-\u00f3ptica. Estas propiedades se deben fundamentalmente a efectos derivados de la reducida dimensionalidad y de la matriz que embebe las nanopart\u00edculas. El objetivo fundamental de esta tesis es estudiar c\u00f3mo influyen los efectos derivados de la nanoestructuraci\u00f3n y de la naturaleza de la matriz en la actividad magn\u00e9tica y magneto-\u00f3ptica de nanopart\u00edculas magn\u00e9ticas embebidas en distintas matrices diel\u00e9ctricas y met\u00e1licas. desarrollo del trabajo y metodolog\u00eda  en este trabajo se combinan aspectos experimentales, como la fabricaci\u00f3n y caracterizaci\u00f3n de las nanopart\u00edculas, con aspectos m\u00e1s fundamentales, como es el an\u00e1lisis e interpretaci\u00f3n de la actividad magn\u00e9tica y magneto-\u00f3ptica. Para la fabricaci\u00f3n de los sistemas de nanopart\u00edculas se han utilizado varias t\u00e9cnicas como son la pulverizaci\u00f3n cat\u00f3dica y la ablaci\u00f3n l\u00e1ser. Para estudiar e interpretar la actividad magn\u00e9tica y magneto-\u00f3ptica de los sistemas es preciso realizar previamente una buena caracterizaci\u00f3n morfol\u00f3gica y estructural de las nanopart\u00edculas, para lo cual se utilizaron un amplio abanico de t\u00e9cnicas entre las cuales se encuentran afm, tem y xrd. La caracterizaci\u00f3n magn\u00e9tica y magneto-\u00f3ptica se llev\u00f3 a cabo mediante la obtenci\u00f3n de ciclos de hist\u00e9resis y de espectros de rotaci\u00f3n y elipticidad, para lo cual se utilizaron t\u00e9cnicas basadas en el efecto kerr, en configuraci\u00f3n transversal y polar, combinadas con el empleo de la magnetometr\u00eda squid. Por \u00faltimo, para el an\u00e1lisis e interpretaci\u00f3n de la actividad \u00f3ptica y magneto-\u00f3ptica de los sistemas se utilizaron distintos formalismos, como la aproximaci\u00f3n de medios efectivos de maxwell-garnett y el formalismo de la matriz de \u00abscattering\u00bb. en esta tesis se emplean diferentes aproximaciones para investigar el efecto de la nanoestructuraci\u00f3n y de la matriz en la respuesta magn\u00e9tica y en la actividad magneto-\u00f3ptica. Por un lado, se analizan sistemas de nanopart\u00edculas de co embebidas en matrices diel\u00e9ctricas con distintos \u00edndices de difracci\u00f3n, como son ain, mgo y zr02, en los cuales se ponen de manifiesto efectos debidos al confinamiento de los electrones dentro de las nanopart\u00edculas. Por otro lado, se investigan sistemas de nanopart\u00edculas de co embebidas en distintas matrices met\u00e1licas como son al, au y pt, en las cuales se detectan efectos relacionados con la nanoestructuraci\u00f3n y con la polarizabilidad magn\u00e9tica de las matrices. Para la obtenci\u00f3n los sistemas de nanopart\u00edculas magn\u00e9ticas en matriz met\u00e1lica se han utilizado dos modos de crecimiento, por un lado auto-ensamblado sobre sustratos de ai2o3(0001) y por otro lado se realizado una aproximaci\u00f3n a la auto-organizaci\u00f3n mediante la preparaci\u00f3n de la superficie reconstruida del au(111) por \u00faltimo se estudia el desarrollo de ordenamiento qu\u00edmico y de anisotrop\u00eda magn\u00e9tica perpendicular en nanopart\u00edculas de fepd depositadas sobre un sustrato diel\u00e9ctrico como es el mgo y sobre un metal como es el v. aportaciones de car\u00e1cter gen\u00e9rico o experimental se ha encontrado que en nanopart\u00edculas magn\u00e9ticas embebidas en matrices diel\u00e9ctricas la actividad magneto-\u00f3ptica disminuye debido a efectos derivados del confinamiento de los electrones dentro de ellas. Se ha comprobado que la actividad magneto-\u00f3ptica de las nanopart\u00edculas puede ser descrita adecuadamente en funci\u00f3n su tama\u00f1o mediante un modelo de electrones libres variando el tiempo de relajaci\u00f3n de los electrones. En sistemas de nanopart\u00edculas magn\u00e9ticas embebidas en matrices met\u00e1licas se han puesto de manifiesto efectos derivados de la nanoestructuraci\u00f3n y del grado de polarizabilidad de la matriz tanto en la actividad magn\u00e9tica como en la magneto-\u00f3ptica. Por \u00faltimo, se han obtenido nanopart\u00edculas de fepd con alto ordenamiento qu\u00edmico, con alta anisotrop\u00eda perpendicular y magn\u00e9ticamente desacopladas. Se ha comprobado que su actividad magneto-\u00f3ptica est\u00e1 \u00edntimamente relacionada con el grado de ordenamiento qu\u00edmico de las mismas.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Efectos de matriz y tama\u00f1o en las propiedades magneticas y magneto-opticas de nanoparticulas magneticas.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Efectos de matriz y tama\u00f1o en las propiedades magneticas y magneto-opticas de nanoparticulas magneticas. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Cesar Clavero Perez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 23\/02\/2007<\/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>Gaspar Armelles Reig<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Juan Bartolom\u00e9 sanjoaqu\u00edn <\/li>\n<li>xavier Batle gelabert (vocal)<\/li>\n<li>Carlos Andr\u00e9s Prieto de castro (vocal)<\/li>\n<li>Jos\u00e9 ignacio Martin carbajo (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Cesar Clavero Perez Contenido agradecimientos &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;..Xi cap\u00edtulo 1.- Introducci\u00f3n y motivaci\u00f3n de la tesis 1.1. Introducci\u00f3n y [&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":[740,560],"tags":[5760,126410,12554,125252,14622,126411],"class_list":["post-57218","post","type-post","status-publish","format-standard","hentry","category-magnetismo","category-quimica-fisica","tag-carlos-andres-prieto-de-castro","tag-cesar-clavero-perez","tag-gaspar-armelles-reig","tag-jose-ignacio-martin-carbajo","tag-juan-bartolome-sanjoaquin","tag-xavier-batle-gelabert"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/57218","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=57218"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/57218\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=57218"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=57218"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=57218"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}