Dielectric relaxation in NH4HSO4 above room temperature
Journal article, 2006

The dispersion curves of the dielectric response of NH4HSO4 show that the corrected imaginary part of permittivity, epsilon", and its real part epsilon' versus frequency reveal a dielectric relaxation around 9.1 x 10(5) Hz at 31 degrees C, which shifts to higher frequencies (similar to 10(6) Hz) as the temperatures increases. The relaxation frequency shows an activated relaxation process over the temperature range 31-83 degrees C with activation energy E-a = 0.14 eV, which is close to that derived from the dc conductivity. We suggest that the observed dielectric relaxation could be produced by the H+ jump and SO4- reorientation that cause distortion and change the local lattice polarizability inducing dipoles like HSO4-.


J.E. Diosa

University of Valle

R. A. Vargas

University of Valle

Ingvar Albinsson

University of Gothenburg

Bengt-Erik Mellander

Chalmers, Applied Physics, Solid State Physics

Solid State Ionics

0167-2738 (ISSN)

Vol. 177 13-14 1107-1110

Subject Categories

Condensed Matter Physics



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