Dielectric relaxation in NH4HSO4 above room temperature
Artikel i vetenskaplig tidskrift, 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-.

Författare

J.E. Diosa

Universidad del Valle

R. A. Vargas

Universidad del Valle

Ingvar Albinsson

Göteborgs universitet

Bengt-Erik Mellander

Chalmers, Teknisk fysik, Fasta tillståndets fysik

Solid State Ionics

0167-2738 (ISSN)

Vol. 177 13-14 1107-1110

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1016/j.ssi.2006.04.021