<?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>S0035-001X2020000500580</article-id>
<article-id pub-id-type="doi">10.31349/revmexfis.66.580</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Electron spin resonance and magnetic studies of nickel ions doped P2O5-ZnO-Na2O glassy system]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rayan]]></surname>
<given-names><![CDATA[D.A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Elbashar]]></surname>
<given-names><![CDATA[Y.H.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moslem]]></surname>
<given-names><![CDATA[S.S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Central Metallurgical Research and Development Institute  ]]></institution>
<addr-line><![CDATA[Cairo ]]></addr-line>
<country>Egypt</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,ELGazeera High institute for Engineering and Technology Department of Basic Science ]]></institution>
<addr-line><![CDATA[Cairo ]]></addr-line>
<country>Egypt</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Cairo University Egypt Nanotechnology Center ]]></institution>
<addr-line><![CDATA[Giza ]]></addr-line>
<country>Egypt</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Modern Academy for Engineering and Technology Basic Science Department ]]></institution>
<addr-line><![CDATA[Cairo ]]></addr-line>
<country>Egypt</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2020</year>
</pub-date>
<volume>66</volume>
<numero>5</numero>
<fpage>580</fpage>
<lpage>584</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2020000500580&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2020000500580&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2020000500580&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract We prepared 42P2O5-40ZnO-(18-x)Na2O-(x)NiO glasses doped with xNiO where 1 &#8804; x &#8804; 6 mol.%. The optical absorption indicates that the nickel ions exist in both sites tetrahedral and octahedral as the concentration of NiO is increased. This investigation has provided the increasing degree of disorder in the glass network at higher concentrations of NiO. The magnetic characteristics investigated using two techniques: electron spin resonance spectra and magnetic properties using vibrating sample magnetometer at room temperature. The electron spin resonance spectra exhibit resonance signal without hyperfine interaction of all the investigated glass samples. It is found that Ni2+ ions were in octahedral sites and it has 3A 2g as ground state. The spin-Hamiltonian parameters are evaluated from the electron spin resonance spectra and we found a variation of g  || and g &#8869; with different nickel concentration. Interesting results are found for the number of Ni2+ ions participating in resonance (N) and paramagnetic susceptibility (&#967;). The magnetic properties were performed at room temperature under an applied field of 20 kOe and the hysteresis loops of the powders were extracted for all the considered samples.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Phosphate glass]]></kwd>
<kwd lng="en"><![CDATA[Transition metal ions]]></kwd>
<kwd lng="en"><![CDATA[ESR characterization]]></kwd>
<kwd lng="en"><![CDATA[magnetic properties]]></kwd>
</kwd-group>
</article-meta>
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