Gadolinium-substitution induced effects on the structure and AC electrical properties of cobalt ferrite
Source abstract
Abstract
Abstract We report on the frequency ( f =20 Hz–1 MHz) and temperature ( T =300–600 K) dependent electrical properties of gadolinium (Gd) substituted cobalt ferrite (CoF 2− x Gd x O 4 (CFGO); x =0.00–0.40). Gd-substituted cobalt ferrites crystallize in cubic inverse spinel phase. CFGO materials exhibit lattice parameter expansion from 8.373 A ( x =0.0) to 8.422 A ( x =0.4) due to the larger ionic radius of Gd 3+ compared to Fe 3+ . The effect of Gd-substitution is significant on the electrical properties; electrical conductivity decreases with increasing Gd-concentration. A two-layer model consisting of semiconducting-CFGO-grains separated by insulating grain-boundaries was able to account for the observed temperature and frequency dependent electrical properties.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic Properties and Synthesis of Ferrites · Multiferroics and related materials · Magneto-Optical Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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