<?xml version='1.0' encoding='utf-8'?>
<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:contributor>Charles Briggs</dc:contributor>
  <dc:contributor>T. Tsang</dc:contributor>
  <dc:contributor>F. Senftle</dc:contributor>
  <dc:contributor>Corrine Alexander</dc:contributor>
  <dc:creator>A. N. Thorpe</dc:creator>
  <dc:date>1977</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;Magnetic susceptibility measurements have been made for both Er- and Yb-doped (1&amp;amp;#x0303;0&lt;/span&gt;&lt;sup&gt;3&lt;/sup&gt;&lt;span&gt;ppm) zircon single crystals with the magnetic field perpendicular and parallel to the [001] axis. Large susceptibility anisotropies were found in both cases. Our observed anisotropies of ZrSiO&lt;/span&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;: Yb indicate small populations (1&amp;amp;#x0303;9%) of Yb ions at the axial (tetragonal) sites, as the susceptibility of ZrSiO&lt;/span&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;: Yb would be nearly isotropic if the Yb ions only occupied the orthorhombic sites. For Er&lt;/span&gt;&lt;sup&gt;3+&lt;/sup&gt;&lt;span&gt;&amp;nbsp;in orthorhombic sites of zircon, our data indicate that the first excited state is paramagnetic with&amp;nbsp;&lt;/span&gt;&lt;i&gt;g&lt;/i&gt;&lt;sub&gt;&lt;i&gt;x&lt;/i&gt;&lt;/sub&gt;&lt;span&gt;&amp;nbsp;= 9 and&amp;nbsp;&lt;/span&gt;&lt;i&gt;g&lt;/i&gt;&lt;sub&gt;&lt;i&gt;y&lt;/i&gt;&lt;/sub&gt;&lt;span&gt;&amp;nbsp;5&amp;amp;#x0303; at 20 cm&lt;/span&gt;&lt;sup&gt;−1&lt;/sup&gt;&lt;span&gt;&amp;nbsp;above the ground state (&lt;/span&gt;&lt;i&gt;g&lt;/i&gt;&lt;sub&gt;&lt;i&gt;x&lt;/i&gt;&lt;/sub&gt;&lt;span&gt;&amp;nbsp;0&amp;amp;#x0303;,&amp;nbsp;&lt;/span&gt;&lt;i&gt;g&lt;/i&gt;&lt;sub&gt;&lt;i&gt;y&lt;/i&gt;&lt;/sub&gt;&lt;span&gt;&amp;nbsp;1&amp;amp;#x0303;5). The first excited state is quite similar to the ground states observed for Er&lt;/span&gt;&lt;sup&gt;3+&lt;/sup&gt;&lt;span&gt;&amp;nbsp;in many host lattices&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1016/0022-3697(77)90180-9</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Elsevier</dc:publisher>
  <dc:title>Anisotropic magnetic susceptibility of erbium and ytterbium in zircon, ZrSiO4</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>