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Contribution to the Study of 3d4 Ions in Al2O3 and MgO by Low Temperature Thermal Conductivity Measurements Under Uniaxial Stress

  • J. Rivallin
  • B. Salce

Abstract

It is well known that 3d4 ions in cubic or trigonal symetry show a dynamic Jahn-Teller effect in the fundamental orbital doublet 5E. From previous measurements by A.P.R.[1][2], and low temperature thermal conductivity [3][4], theoretical models have been proposed for Cr2+ in MgO and Al2O3, in the limit of a small inversion splitting δ [5][6]. The coupling constant b VE can be determined from the variation of the vibronic energy levels due to an applied stress, and this can be done by measuring the changes of the thermal conductivity K.

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Copyright information

© Plenum Press, New York 1976

Authors and Affiliations

  • J. Rivallin
    • 1
  • B. Salce
    • 1
  1. 1.Service des Basses TempératuresCentre d’Etudes Nucléaires de GrenobleGrenoble-CedexFrance

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