Electrical, optical and magneto-electric characteristics of BiBaFeCeO6 electronic system

Parida, Kulamani; Dehury, Sujit Kumar; Choudhary, R. N. P.

doi:10.1016/j.mseb.2017.08.025

Cited by 37 publications

(7 citation statements)

References 41 publications

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“…The observed XRD pattern and obtained lattice parameters are very much similar and consistent with the reported ones [17]. The crystallite size (D) of the sample can broadly be determined by using peak broadening, scattering angle, wavelength, and optimized constant of diffraction peaks in Scherrer's equation [18,19]. The determined D value is 41 nm and density of the sample is 4.78 g/cm 3 .…”

Section: Structuresupporting

confidence: 84%

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Structure, dielectric and electrical properties of relaxor lead-free double perovskite: Nd2NiMnO6

Das

Choudhary

2019

PAC

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In this paper, dielectric relaxor, impedance, AC conductivity and electrical modulus of double perovskite Nd 2 NiMnO 6 , prepared by a solid state reaction method and sintered at 1250°C, have been reported in the wide temperature (25-150°C) and frequency (1 kHz-1 MHz) ranges. From the preliminary X-ray structural analysis, it is found that the structure of the material is monoclinic. In the study of the temperature dependence of the dielectric constant, the relaxor behaviour of the material is observed. Such type of behaviour is explained by a modified Curie-Weiss and a Vogel-Fulcher law. By analysing Nyquist plots, the existence of grain and grain boundary effects is established. The non-Debye type of relaxation is investigated by the analysis of complex impedance and the modulus data. From the study of impedance data, it is found that the grain resistance is reduced with the increase in temperature indicating the existence of negative temperature coefficient of resistance (NTCR) behaviour in the material which also matches with temperature versus AC conductivity plots. From these results, it may be concluded that this compound may have extreme potential for different high temperature applications.

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Section: Structuresupporting

confidence: 84%

“…The peak in tan δ is shifted to high temperatures with the increment of frequency. Because of an increase of electrical conductivity, tan δ rises more rapidly at high temperatures [18].…”

Section: Effect Of Temperaturementioning

confidence: 99%

Structure, dielectric and electrical properties of relaxor lead-free double perovskite: Nd2NiMnO6

Das

Choudhary

2019

PAC

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“…The ε r and tanδ value falls on enhancement of frequency, which is a common trend of oxide materials. The different polarizations (interfacial, dipole, atomic, ionic, and electronic) have been dominant in low-frequency region [9]. The polarization fades away with enhancement of frequency slowly; as a result, dielectric constant decreases for both samples.…”

Section: Analysis Of Dielectric Parametersmentioning

confidence: 94%

Dielectric and impedance spectroscopy of aluminium oxide substituted fused silica samples

et al. 2019

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This paper shows a comparative study of sintered and thermally quenched Al 2 O 3 substituted fused silica ceramics processed by colloidal suspension route. The structural analysis is performed using X-ray diffraction measurements. The natural surface micrographs present close packing of non-uniform shape of grains. The high permittivity and low loss are illustrated from frequency dependent permittivity. The impedance spectroscopy shows non-Debye type relaxation mechanism. The Nyquist plot shows the presence of only grain effect. The overlapping large Polaron tunnelling model is attributed from the conduction studies of both sintered and quenched samples.

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“…In Figure 4(e), increase in tangent loss (tan δ) as a function of temperature is related to the addition of dc conductivity due to hopping of electrons among ions. The huge amount of energy loss has been produced by passage of charge carriers to grain boundaries, only at low frequency, that also results in high values of tan δ in comparison to high frequency region [62,63]. Both ε′ and tan δ are decreasing and attaining almost a constant value in the high frequency regions exhibiting features of polar dielectrics in La 2 CoNiO 6 ceramics [52,[64][65][66].…”

Section: Impedance and Dielectric Analysismentioning

confidence: 99%

Structural, dielectric and magnetic properties of double perovskite-La2CoNiO6 ceramics synthesised by wet chemical route

Singh

Kumar

Goutam

et al. 2021

IJNT

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The polycrystalline double perovskite-La 2 CoNiO 6 ceramics were successfully synthesised by facile wet chemical route. The X-ray diffraction pattern has confirmed the formation of rhombohedral phase with 3 R c symmetry and calculated value of lattice parameters as, a = b = 5.64 Å and c =13.25 Å, respectively. The presence of La 3+ ions, Co 2+ / Co 3+ ions, and Ni 2+ ions on the surface of La 2 CoNiO 6 has been exhibited via X-ray photoelectron spectroscopy. The temperature and frequency dependent dielectric and impedance analysis has revealed the effect of grains and grain boundaries in the relaxation process. The observed values of ac conductivity varied from 5.27 × 10 -6 S/m to 1.06 × 10 -5 S/m with variation of temperature from 300 K to 473 K at frequency of 1 kHz. Further, La 2 CoNiO 6 is a new ferromagnetic semiconductor exhibiting spin glass transition at low temperature of ~50 K. The present first report on structural, dielectric and magnetic study makes La 2 CoNiO 6 a promising material for electronic devices applications.

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Electrical, optical and magneto-electric characteristics of BiBaFeCeO6 electronic system

Cited by 37 publications

References 41 publications

Structure, dielectric and electrical properties of relaxor lead-free double perovskite: Nd2NiMnO6

Structure, dielectric and electrical properties of relaxor lead-free double perovskite: Nd2NiMnO6

Dielectric and impedance spectroscopy of aluminium oxide substituted fused silica samples

Structural, dielectric and magnetic properties of double perovskite-La2CoNiO6 ceramics synthesised by wet chemical route

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