Dielectric and polarization experiments in high loss dielectrics: a word of caution
Idioma
en
Article de revue
Este ítem está publicado en
Applied Physics Letters. 2008, vol. 93, n° 3, p. 032902 (3 p.)
American Institute of Physics
Resumen en inglés
The recent quest for improved functional materials like high permittivity dielectrics and/or multiferroics has triggered an intense wave of research. Many materials have been checked for their dielectric permittivity or ...Leer más >
The recent quest for improved functional materials like high permittivity dielectrics and/or multiferroics has triggered an intense wave of research. Many materials have been checked for their dielectric permittivity or their polarization state. In this report, we call for caution when samples are simultaneously displaying insulating behavior and defect-related conductivity. Many oxides containing mixed valent cations or oxygen vacancies fall in this category. In such cases, most of standard experiments may result in effective high dielectric permittivity which cannot be related to ferroelectric polarization. Here we list few examples of possible discrepancies between measured parameters and their expected microscopic origin.< Leer menos
Palabras clave en inglés
Bismuth compounds
Calcium compounds
Copper compounds
Dielectric losses
Dielectric polarisation
Electrical conductivity
Ferroelectric materials
Lutetium compounds
Permittivity
Tantalum compounds
Vacancies (crystal)
Orígen
Importado de HalCentros de investigación