Anomalies in the Susceptibility and the Resistivity Due to s-d Interaction in a Spinel System Cu(Rh1-xCrx)2S4(0≦x≦0.40)

  • Itoh Hiroki
    Department of Physics, Faculty of Science, Hokkaido University

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  • Anomalies in the Susceptibility and the Resistivity Due to <I>s</I>-<I>d</I> Interaction in a Spinel System Cu(Rh<SUB>1−<I>x</I></SUB>Cr<I><SUB>x</SUB></I>)<SUB>2</SUB>S<SUB>4</SUB> (0≤<I>x</I>≤0.40)
  • Anomalies in the Susceptibility and the
  • Anomalies in the Susceptibility and the Resistivity Due to <i>s</i>-<i>d</i> Interaction in a Spinel System Cu(Rh<sub>1-<i>x</i></sub>Cr<sub><i>x</i></sub>)<sub>2</sub>S<sub>4</sub> (0≤<i>x</i>≤0.40)

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Magnetization, susceptibility and resistivity measurements were made on the system Cu(Rh1−xCrx)2S4. The resistivities (ρ) of the Cr substituted samples show an increase below room temperature. Δρ (solute resistivity) vs temperature curve for x=0.10 seems to show Kondo anomaly. The samples (x=0.30, 0.40) show ferromagnetism (TC=39 K, 166 K). The susceptibilities (χ) of x=0.10 and 0.20 show an anomaly at about 200∼230 K and increase markedly at lower temperatures. χ vs T curve for x=0.10 was analyzed by assuming θp=0 and the magnetic moment to be temperature-dependent. A unified picture of the properties of the three spinel systems Cu(Rh1−xCrx)2S4 (Se4) and Ni(Rh1−xCrx)2S4 is presented.

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