Giant Dielectric Response of Corundum Structure Fe 0.7 Cr 1.3 O 3 Nanocrystallite
Source abstract
Abstract
We report the structure and dielectric properties of Fe 0.7 Cr 1.3 O 3 nanocrystallites synthesized by co-precipitation method. X-ray diffraction shows that the nanoparticles possess a typical corundum structure and no other impurity phases are observed. These nanoparticles exhibit a high dielectric permittivity ( ε ′ ∼ 10 3 ) at room temperature below 1 kHz. The dielectric relaxation follows the thermally activated process with activation energy of 0.226 eV. Both components of grain relaxation and grain boundary relaxation times were extracted from modulus spectra. The internal barrier layer capacitance (IBLC) effect is responsible for observed high dielectric response in these nanoparticles.
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Research context
OpenAlex topics: Dielectric properties of ceramics · Magnetic Properties and Synthesis of Ferrites · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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