Structural, dielectric and electrical behavior of Gd-doped LaFeO3 for possible devices

Saikia, Nabasmita; Chakravarty, Rimpi; Sen, Santanu; Hota, R.L.; Parida, R.K.

doi:10.1016/j.matpr.2022.02.271

Cited by 2 publications

(1 citation statement)

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“…The occurrence of space charges, as well as cationic disarray between neighboring sites (cf. the combination of covalent and ionic bonds, mentioned in Introduction), could explain why σ' ac increased so steadily with the frequency [26]. High electronic conductivity and dielectric loss make the capacitive application of this LFO limited, but the high permittivity over a certain frequency range is its notable property, and an analysis was carried out to determine the best working conditions for this sample.…”

Section: Dielectric Characterizationmentioning

confidence: 96%

Characterization of LaFeO3 Dielectric Ceramics Produced by Spark Plasma Sintering

Ctibor,

Sedláček,

Illková

et al. 2024

Materials

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Commercially available LaFeO3 powder was processed using the spark plasma sintering (SPS) technique. The results of the dielectric measurement showed high permittivity, but this was strongly frequency-dependent and was also accompanied by a high loss tangent. The chemical purity of the powder and changes induced by the SPS process influenced the stability of the dielectric parameters of the bulk compacts. A microstructure with a homogeneous grain size and a certain porosity was produced. The microhardness of the sintered LaFeO3 was rather high, about 8.3 GPa. All the results are in reasonable agreement with the literature related to the production of LaFeO3 using different techniques. At frequencies as low as 100 Hz, the material behaved like a colossal permittivity ceramic, but this character was lost with the increasing frequency. On the other hand, it exhibited persistent DC photoconductivity after illumination with a standard bulb.

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Section: Dielectric Characterizationmentioning

confidence: 96%