Jp. Heinss et al., DIELECTRIC-PROPERTIES OF LEAD-SCANDIUM-NIOBATE AND STRONTIUM-BARIUM-NIOBATE AT MILLIKELVIN TEMPERATURES, Ferroelectrics. Letters section, 16(3-4), 1993, pp. 87-94
The complex dielectric constant of PSN and SBN was measured below 1K i
n the frequency range between 1 and 200 kHz. The observed behaviour of
these ferroelectric crystalline materials is known to be typically fo
r amorphous and disordered materials.