<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2008000400002</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Characterization of ALN thin films deposited by DC reactive magnetron sputtering]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Méndez]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morales-Rodríguez]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Machorro]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[De La Cruz]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,UANL Facultad de Ciencias Físico-Matemáticas Laboratorio de Nanociencias y Nanotecnología]]></institution>
<addr-line><![CDATA[San Nicolás de los Garza N.L.]]></addr-line>
<country>México</country>
</aff>
<aff id="A02">
<institution><![CDATA[,UANL FCFM Programa de Posgrado en Ingeniería Física Industrial]]></institution>
<addr-line><![CDATA[San Nicolás de los Garza N.L.]]></addr-line>
<country>México</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Universidad Nacional Autónoma de México Centro de Ciencias de la Materia Condensada ]]></institution>
<addr-line><![CDATA[Ensenada B.C.]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2008</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2008</year>
</pub-date>
<volume>54</volume>
<numero>4</numero>
<fpage>271</fpage>
<lpage>278</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2008000400002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2008000400002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2008000400002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[A set of AlN thin-films was prepared by reactive magnetron sputtering at room temperature. The purpose of this work was to study the effect of oxygen impurities on the structural and optical properties of AlN films. The structural and optical properties of the resulting films were characterized using X-ray diffraction (XRD) and spectroscopic ellipsometry, respectively. Depending on the deposition conditions, films can be hexagonal (wurtzite, P6(3)3m3) or cubic (zinc blende, Fm3m) in their microstructure. From the optical measurements, the ellipsometric parameters (&#968;,&#916;) and the real refractive index as a function of energy were obtained. From the ellipsometric measurements, a model of the Lorentz single-oscillator was employed to estimate the optical band gap, Eg.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se utilizó la técnica de erosión iónica reactiva para crecer películas delgadas de nitruro de aluminio (AlN). El propósito principal de este trabajo consistió en analizar el efecto del oxígeno en las propiedades ópticas y estructurales de las películas. Las propiedades estructurales y ópticas de las muestras se caracterizaron con espectroscopia elipsométrica y difracción de rayos X, respectivamente. La microestructura que pueden presentar las películas puede ser hexagonal (tipo wurzita, P6(3)3m3) ó cubica (zinc-blenda, Fm3m), dependiendo de las condiciones de depósito. A partir de la medición de los parámetros elipsométricos (&#968;,&#916;), se utilizó el modelo del oscilador simple de Lorentz para obtener un estimado del ancho óptico, Eg.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Reactive sputtering]]></kwd>
<kwd lng="en"><![CDATA[thin films]]></kwd>
<kwd lng="en"><![CDATA[AlN]]></kwd>
<kwd lng="es"><![CDATA[Erosión iónica reactiva]]></kwd>
<kwd lng="es"><![CDATA[películas delgadas]]></kwd>
<kwd lng="es"><![CDATA[AlN]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Investigaci&oacute;n</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>Characterization of ALN thin films deposited by DC reactive magnetron sputtering</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>M. Garc&iacute;a&#150;M&eacute;ndez</b><b>&ordf;</b><b>, S. Morales&#150;Rodr&iacute;guez<sup>b</sup>, R. Machorro<sup>c</sup> and W. De La Cruz<sup>c</sup></b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>&ordf; Laboratorio de Nanociencias y Nanotecnolog&iacute;a, Facultad de Ciencias F&iacute;sico&#150;Matem&aacute;ticas de la UANL, Divisi&oacute;n de Posgrado, Manuel L. Barrag&aacute;n S/N, Edif. de Posgrado, Ciudad Universitaria, San Nicol&aacute;s de los Garza, N.L. 66450, M&eacute;xico, </i><i>e&#150;mail: <a href="mailto:mgarcia@fcfm.uanl.mx">mgarcia@fcfm.uanl.mx</a></i></font></p>     <p align="justify"><font face="verdana" size="2"><sup>b</sup> <i>Programa de Posgrado en Ingenier&iacute;a F&iacute;sica Industrial, FCFM&#150;UANL, Divisi&oacute;n de Posgrado, Manuel L. Barrag&aacute;n S/N, Edif. de Posgrado, Ciudad Universitaria, San Nicol&aacute;s de los Garza, N.L. 66450, M&eacute;xico.</i></font></p>     <p align="justify"><font face="verdana" size="2"><sup>c</sup> <i>Centro de Ciencias de la Materia Condensada de la Universidad Nacional Aut&oacute;noma de M&eacute;xico, Km. 107, Carretera Tijuana&#150;Ensenada, Ensenada, B.C. 22860, M&eacute;xico</i></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Recibido el 30 de mayo de 2007    <br>   Aceptado el 2 de junio de 2008</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>     <p align="justify"><font face="verdana" size="2">A set of AlN thin&#150;films was prepared by reactive magnetron sputtering at room temperature. The purpose of this work was to study the effect of oxygen impurities on the structural and optical properties <i>of AlN </i>films. The structural and optical properties of the resulting films were characterized using X&#150;ray diffraction (XRD) and spectroscopic ellipsometry, respectively. Depending on the deposition conditions, films can be hexagonal (wurtzite, P6<SUB>3</SUB>3m3) or cubic (zinc blende, Fm3m) in their microstructure. From the optical measurements, the ellipsometric parameters (<em>&psi;</em>,&Delta;) and the real refractive index as a function of energy were obtained. From the ellipsometric measurements, a model of the Lorentz single&#150;oscillator was employed to estimate the optical band gap, <i>E<sub>g</sub>.</i></font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords: </b>Reactive sputtering; thin films; AlN.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2">Se utiliz&oacute; la t&eacute;cnica de erosi&oacute;n i&oacute;nica reactiva para crecer pel&iacute;culas delgadas de nitruro de aluminio (AlN). El prop&oacute;sito principal de este trabajo consisti&oacute; en analizar el efecto del ox&iacute;geno en las propiedades &oacute;pticas y estructurales de las pel&iacute;culas. Las propiedades estructurales y &oacute;pticas de las muestras se caracterizaron con espectroscopia elipsom&eacute;trica y difracci&oacute;n de rayos X, respectivamente. La microestructura que pueden presentar las pel&iacute;culas puede ser hexagonal (tipo wurzita, P6<SUB>3</SUB>3m3) &oacute; cubica (zinc&#150;blenda, Fm3m), dependiendo de las condiciones de dep&oacute;sito. A partir de la medici&oacute;n de los par&aacute;metros elipsom&eacute;tricos (<em>&psi;</em>,&Delta;)<i>, </i>se utiliz&oacute; el modelo del oscilador simple de Lorentz para obtener un estimado del ancho &oacute;ptico, <i>E<sub>g</sub>.</i></font></p>     <p align="justify"><font face="verdana" size="2"><b>Descriptores: </b>Erosi&oacute;n i&oacute;nica reactiva; pel&iacute;culas delgadas; AlN.</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">PACS: 81.15.&#150;Z, 68.55.&#150;a, 82.80.&#150;d</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmf/v54n4/v54n4a2.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Acknowledgements</b></font></p>     <p align="justify"><font face="verdana" size="2">This work was sponsored by CONACyT&#150;M&eacute;xico (project CO2&#150;43707) and PAICyT&#150;UANL (project CA1256&#150;06). M. Garc&iacute;a M&eacute;ndez would like to thank Dr. Miguel &Aacute;valos Borja, from CCMC&#150;UNAM, Ensenada, because the facilities granted for the use of XRD equipment. Also to Elo&iacute;sa Aparicio Ceja, V Garcia and J.A. Diaz for the technical support. Authors thanks Azahel Bueno for his ellipsometric measurements.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>References</b></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">1. J. Chaudhuri <i>et al, Mater Charac </i><b>58</b> (2006) 672.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8399087&pid=S0035-001X200800040000200001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">2. J. 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