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Magnetic properties and energy transfer in the luminophors CaS:Eu,Cl

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Abstract

Studies have been performed on the magnetic properties and electron paramagnetic resonance (EPR) spectra of the small-crystal luminophors CaS:Eu,Cl. By comparing the EPR and magnetic susceptibility data we have determined that Eu enters into the CaS matrix primarily in the trivalent state Eu3+. We have found that the magnetic susceptibility of the sample with the lowest europium content (5×10−3 at. %) has a sharp peak at T≈5 K. A model is proposed of clusters into which the europium ions in these luminophors can associate. On the basis of this model an explanation is given for the anomalous temperature dependence of the magnetic susceptibility as well as a long list of other experimental facts (including peculiarities of the thermal luminescence).

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Authors and Affiliations

  1. D.I. Mendeleev Russian Chemical Engineering University, 125820, Moscow, Russia

    S. O. Klimonskii, A. É. Primenko & V. D. Kuznetsov

  2. University of Tartu, 202400, Tartu, Estonia

    M. I. Danilkin & V. Seman

Authors
  1. S. O. Klimonskii
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  2. A. É. Primenko
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  3. V. D. Kuznetsov
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  4. M. I. Danilkin
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  5. V. Seman
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Additional information

Zh. Éksp. Teor. Fiz. 113, 1698–1707 (May 1998)

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Klimonskii, S.O., Primenko, A.É., Kuznetsov, V.D. et al. Magnetic properties and energy transfer in the luminophors CaS:Eu,Cl. J. Exp. Theor. Phys. 86, 924–929 (1998). https://doi.org/10.1134/1.558563

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  • DOI: https://doi.org/10.1134/1.558563

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