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Magnetic Properties and Electrical Conduction of Copper‐Containing Sulfo‐ and Selenospinels

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2 Author(s)
Lotgering, F.K. ; Philips Research Laboratories, Eindhoven, Netherlands ; van Stapele, R.P.

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CuCr1+xRh1-xSe4 with -1 ≪ x ≦ 1 and CuCr1+xTi1-xS4 with 0 ≪ x ≦ 1 show p-type metallic conduction and are ferromagnetic, while CuCr1+xTi1-xS4 with x≪0 show n-type metallic conduction and no magnetic ordering at 4°K. From the magnetic and electrical properties, which indicate that Cu is monovalent in these compounds, a model for the electronic structure of copper-containing sulfospinels is deduced. Ferromagnetism and p-type conduction are attributed to holes in a broad valence band, n-type conduction to electrons in a broad conduction band. Susceptibility measurements on CuCo2S4, CuTi2S4, CuCoTiS4, CuRh2S4, and CuRh2Se4 are reported. The main contribution to the temperature-independent susceptibility observed is attributed to the Van Vleck susceptibility of Co3+ or Rh3 ions in the low spin state t26.

Published in:

Journal of Applied Physics  (Volume:39 ,  Issue: 2 )

Date of Publication:

Feb 1968

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