<?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>S0035-001X2018000200127</article-id>
<article-id pub-id-type="doi">10.31349/revmexfis.64.127</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Some effects of the doping &#945;-Al2O3 nanoparticles in the transport properties of Bi1.65Pb0.35Sr2Ca2Cu3Oy ceramic superconductors]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Wolpez]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Fornaris]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Govea-Alcaide]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jardim]]></surname>
<given-names><![CDATA[R.F.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muné]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Camagüey Departamento de Física ]]></institution>
<addr-line><![CDATA[Camagüey ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Granma Departamento de Ciencias Básicas ]]></institution>
<addr-line><![CDATA[Bayamo ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidade Federal do Amazonas Departamento de Física ]]></institution>
<addr-line><![CDATA[Manaus ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidade de Sao Paulo Instituto de Física ]]></institution>
<addr-line><![CDATA[Sao Paulo SP]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad de Oriente Departamento de Física ]]></institution>
<addr-line><![CDATA[Santiago de Cuba ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<volume>64</volume>
<numero>2</numero>
<fpage>127</fpage>
<lpage>131</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2018000200127&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2018000200127&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2018000200127&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract We present a preliminary study on the effects of nano-size &#945;-Al2 O3 (40 nm) in the transport properties of Bi1.65 Pb0.35 Sr2 Ca2 Cu3 Oy ((Bi,Pb)-2223) ceramic samples. The (Bi,Pb)-2223 samples were synthesized by the solid state reaction method and &#945;-Al2O3 nanoparticles (NPs), with concentrations ranging from 0.1 to 0.7 wt. percent (% wt.), were added before the last heat treatment. All samples were characterized by means of X-rays diffraction patterns, and temperature and magnetic field dependence of the electrical resistivity, &#961;(T, Ba). From the experimental &#961;(T,Ba) data we extracted the critical temperature dependence of the % wt. of &#945;-Al2O3 NPs, and by using the Arrhenius plot the effective pinning energy has been also determined. The results indicate that mostly of the transport properties are optimized for the sample doped with 0.3% wt. of &#945;-Al2O3 NPs.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[(Bi]]></kwd>
<kwd lng="en"><![CDATA[Pb)-2223]]></kwd>
<kwd lng="en"><![CDATA[transport properties]]></kwd>
<kwd lng="en"><![CDATA[doping]]></kwd>
<kwd lng="en"><![CDATA[effects of the material synthesis]]></kwd>
</kwd-group>
</article-meta>
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