<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Sudesh</dc:creator>
  <dc:creator>Rani, S.</dc:creator>
  <dc:creator>Das, Saikat</dc:creator>
  <dc:creator>Rawat, R.</dc:creator>
  <dc:creator>Bernhard, Christian</dc:creator>
  <dc:creator>Varma, G. D.</dc:creator>
  <dc:date>2012-02-24</dc:date>
  <dc:description xmlns:ns0="xml" ns0:lang="en">In the present work, we have studied the effect of Fe composition on the superconducting properties, such as transition temperature (&lt;em&gt;T&lt;/em&gt;&lt;sub&gt;&lt;em&gt;c&lt;/em&gt;&lt;/sub&gt;), upper critical field (&lt;em&gt;H&lt;/em&gt;&lt;sub&gt;&lt;em&gt;c2&lt;/em&gt;&lt;/sub&gt;), and irreversibility field (&lt;em&gt;H&lt;/em&gt;&lt;sub&gt;&lt;em&gt;irr&lt;/em&gt;&lt;/sub&gt;) of FeSe&lt;sub&gt;1/2&lt;/sub&gt;Te&lt;sub&gt;1/2&lt;/sub&gt;. The polycrystalline samples have been prepared via solid state reaction route with nominal compositions Fe&lt;sub&gt;x&lt;/sub&gt;Se&lt;sub&gt;1/2&lt;/sub&gt;Te&lt;sub&gt;1/2&lt;/sub&gt; (x = 0.95, 1.00, 1.05 and 1.10). The x-ray diffraction results show the presence of tetragonal α-FeSe phase with the p4/nmm space group symmetry in all the samples. The zero resistance temperatures, &lt;em&gt;T&lt;/em&gt;&lt;em&gt;c&lt;/em&gt;zero, measured in zero magnetic field, have been found to be 10.0, 12.4, 12.3, and 11.7 K for x = 0.95, 1.00, 1.05, and 1.10, respectively. The temperature dependence of &lt;em&gt;H&lt;sub&gt;c2&lt;/sub&gt;(T&lt;/em&gt;) and &lt;em&gt;H&lt;sub&gt;irr&lt;/sub&gt;(T&lt;/em&gt;) have been calculated from the magnetoresistance data using the criteria of 90% and 10% of normal state resistivity (ρ&lt;sub&gt;n&lt;/sub&gt;) values, respectively. The values of &lt;em&gt;H&lt;sub&gt;c2&lt;/sub&gt;(0&lt;/em&gt;) are 121.3 T, 142.8 T, 82.7 T, and 79.3 T for x = 0.95, 1.00, 1.05, and 1.10, respectively. The possible reasons for the variation of superconducting properties with Fe composition (x) have been described and discussed in this paper.</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>https://folia.unifr.ch/global/documents/302489</dc:identifier>
  <dc:identifier>https://folia.unifr.ch/documents/302489/files/ber_efc.pdf</dc:identifier>
  <dc:language>eng</dc:language>
  <dc:relation>info:eu-repo/semantics/altIdentifier/doi/10.1063/1.3672858</dc:relation>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>License undefined</dc:rights>
  <dc:source>Journal of Applied Physics. - 2012, vol. 111, no. 7, p. E119</dc:source>
  <dc:subject>info:eu-repo/classification/udc/53</dc:subject>
  <dc:title xmlns:ns1="xml" ns1:lang="en">Effect of Fe composition on the superconducting properties (T&lt;sub&gt;c&lt;/sub&gt;, H&lt;sub&gt;c2&lt;/sub&gt; and H&lt;sub&gt;irr&lt;/sub&gt;) of Fe&lt;sub&gt;x&lt;/sub&gt;Se&lt;sub&gt;1/2&lt;/sub&gt;Te&lt;sub&gt;1/2&lt;/sub&gt; (x = 0.95, 1.00, 1.05 and 1.10)</dc:title>
  <dc:type>http://purl.org/coar/resource_type/c_6501</dc:type>
</oai_dc:dc>