ACTA

Effect of Magnesium Substitution on Dielectric Constant of Zn_2-xMg_xInV₃O₁₁ (x = 0.0, 0.4, 1.6) Solid Solutions

B. Sawicki^a, M. Bosacka^b, E. Filipek^b, T. Groń^a, H. Duda^a, M. Oboz^a, P. Urbanowicz^a
^aUniversity of Silesia, Institute of Physics, Uniwersytecka 4, 40-007 Katowice, Poland
^bWest Pomeranian University of Technology, Szczecin, Faculty of Chemical Technology and Engineering, Department of Inorganic and Analytical Chemistry, al. Piastów 42, 71-065 Szczecin, Poland

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The results of magnetic and dielectric measurements of Zn_2-xMg_xInV₃O₁₁ phases with x=0.0, 0.4, and 1.6 showed diamagnetic behavior above room temperature and a strong increase in the relative electrical permittivity, ε_r, with an increase in the magnesium content as well as the high loss tangent, tan δ, above 150 K, irrespective of the magnesium content in the sample. With the increase in the frequency of the electric field both ε_r and tan δ strongly decreased. At low temperatures a residual paramagnetism coming from the paramagnetic ions of vanadium was observed. These effects were interpreted within a framework of the vacancy trapping centers acting as the accumulation of electric charges on the one hand and a mixed valence of vanadium ions on the other.

DOI:10.12693/APhysPolA.134.958
PACS numbers: 72.20.Pa, 72.80.Ga, 75.50.Pp, 75.20.-g