• DocumentCode
    951629
  • Title

    Stability of Br-substituted CuCr2Se4spinels

  • Author

    Pink, H. ; Schafer, H. ; Gobel, H. ; Unger, W.K.

  • Author_Institution
    Forschungslaboratorien der Siemens AG, München, Germany
  • Volume
    10
  • Issue
    3
  • fYear
    1974
  • fDate
    9/1/1974 12:00:00 AM
  • Firstpage
    623
  • Lastpage
    625
  • Abstract
    Cu-rich CuyCr2Se4-zBrxspinels react with air according to CuyCr2Se4-zBrx+ (n/2) O2→Cuy-nCr2Se4-zBrx+ n CuO. By this reaction, the lattice constant aoof the spinels decreases and their Curie temperature Tcincreases. For example, a Cu1.03Cr2.00Se2.96Br0.96spinel with ao= 1.0444 nm and Tc= 216 K reacted with air to Cu0.87Cr2.00Se2.96Br0.96with ao= 1.0416 nm and Tc= 262 K. On the other hand, a Cu-deficient Cu0.78Cr2.00Se2.68Br1.15spinel with ao= 1.0405 nm and Tc= 212 K did not react with air. By this, contradictions in the literature concerning the stability of CuyCr2Se4-zBrxspinels in air are resolved.
  • Keywords
    Chromium compounds; Magnetic semiconductors; Selenium chromium copper spinels; Chemical analysis; Chemical elements; Chromium; Crystals; Lattices; Magnetic semiconductors; Powders; Stability; Temperature dependence; Temperature distribution;
  • fLanguage
    English
  • Journal_Title
    Magnetics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9464
  • Type

    jour

  • DOI
    10.1109/TMAG.1974.1058363
  • Filename
    1058363
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=951629