Electrical transport and magnetic properties of Nd2(WO4)3 |
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Authors: | HB Lal Naseeb Dar |
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Institution: | Department of Physics, University of Gorakhpur, Gorakhpur 273001, India |
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Abstract: | Measurements of the molar magnetic susceptibility (Xm) of a powdered sample of Nd2(WO4)3 in the temperature range 300–900 K, and the electrical conductivity (σ) and dielectric constant (? of pressed pellets of the compound in the temperature range 4.2–1180 K are reported. Xm obeys the Curie-Weiss law with a Curie constant C= 3.13 K/mole, a paramagnetic Curie temperature θ= ?60 K and a moment of Bohr magnetons, p= 3.49 for the Nd3+ ion. The electrical conductivity data can be explained in terms of the usual band model and impurity levels. Both the σ and ?data indicate some sort of phase transition round 1025 K. The conductivity follows Mott's law in the temperature range . The dielectric constant increases slowly up to 600 K, as is usual for ionic solids. The increase becomes much faster above 600 K, which is attributed to space-charge polarization of thermally generated charge carriers. |
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