Structural, electrical and magnetic characteristics of improper multiferroic: GdFeO<sub>3</sub>

Sahoo, Sushrisangita; Mahapatra, P. K.; Choudhary, R. N. P.; Nandagoswami, M L; Kumar, Ashok

doi:10.1088/2053-1591/3/6/065017

Cited by 67 publications

(21 citation statements)

References 61 publications

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“…The conductivity pattern obeys Jonscher power law. According to it when a mobile charge carrier jumps to a new position from the old site, it continues in a state of oscillation between two potential energy minima [33]. Figure 7a presents the frequency dependent real part of the modulus spectrum at various temperatures (250-450°C).…”

Section: Conductivity Studiesmentioning

confidence: 99%

Studies of dielectric and electrical transport characteristics of BaTiO3-BiFeO3-CaSnO3 ternary system

Hajra

Sahoo

Mishra

et al. 2018

PAC

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In the present paper, the ternary system 0.90 BaTiO 3-0.07 BiFeO 3-0.03 CaSnO 3 (referred as BTO-BFO-CSO-3) near the morphotropic phase boundary (MPB) was synthesized via a cost effective mixed-oxide route and sintered at 1050°C. Phase composition analysis confirms that the sample crystallizes in orthorhombic phase with few impurity peaks. Room temperature Raman spectrum depicts the phonon peaks characteristic for BTO-BFO-CSO-3 structure. Microstructural examination by scanning electron microscope shows the uniform distribution of grains on the surface of the density sample. The capacitive and resistive properties at different frequencies and temperatures were obtained by modulus and impedance spectroscopy. The non-Debye relaxation mechanism is highlighted by the impedance analysis. The electrical properties associated with the impedance of the prepared sample are found to be dependent on temperature and frequency. The transport properties follow the Arrhenius equation and the activation energy is calculated for the sample.

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Section: Conductivity Studiesmentioning

confidence: 99%

Studies of dielectric and electrical transport characteristics of BaTiO3-BiFeO3-CaSnO3 ternary system

Hajra

Sahoo

Mishra

et al. 2018

PAC

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“…This fitting is done by taking three pairs of Z ′ and Z ″ data as (x 1, y 1 ), (x 2 , y 2 ), and (x 3 , y 3 ) and computing the center, radius, and the intercept on the real axis. The values of these three pairs of Z ′ and Z ″ data are taken many times to find the best fit of the semicircle . We have calculated the depression angle at three different temperatures (350, 400, and 450 °C), and it was observed that value of depression angle decreases with the increase in temperature.…”

Section: Resultsmentioning

confidence: 99%

Structural and Electrical Characteristics of an Aurivillius Family Compound Bi₂LaTiVO₉

Gupta

Mahapatra

Choudhary

2018

Crystal Research and Technology

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The synthesis and characterization of bismuth lanthanum titanium vanadate (i.e., Bi2LaTiVO9), a new member of bismuth layer structure ferroelectric, are reported in this paper. The compound crystallizes in a single phase orthorhombic system. The smallest pentavalent V5+ ion in the compound results in higher polarization and low loss properties as compared to other similar compounds of Aurivillius family. The partial substitution of La3+ ion at the Bi3+ sites of Bi2O2 layers results in relaxor ferroelectric behavior with an expected decrease in transition temperature. The activation energy for both relaxation and conduction processes is in the vicinity of the activation energy of oxygen vacancy suggesting oxygen–vacancy activated charge carriers in both conductivity and relaxation processes.

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“…The presence of frequency peaks on semicircles can be explained on the basis of following equation 2π • f max • τ = 1, where τ is the mean relaxation time. The non-Debye condition can also be clearly detected and is characterized with presence of imperfect semicircular arcs [17,18]. Figure 3 shows the complex impedance spectra (Nyquist plot), at various temperatures (300-350°C), of the sintered PGaZT-2 sample.…”

Section: Structural and Microstructural Analysismentioning

confidence: 97%

Structural and electrical characteristics of gallium modified PZT ceramics

Sharma

Hajra

Sahoo

et al. 2017

PAC

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In the present paper, the gallium modified lead zirconate titanate ceramics with Zr/Ti = 48/52 (near the morphotropic phase boundary, MPB), having a chemical formula Pb 0.98 Ga 0.02 (Zr 0.48 Ti 0.52) 0.995 O 3 , was synthesized by a mixed-oxide reaction method and sintered. Analysis of phase formation confirmed the coexistence of two phases (tetragonal and monoclinic symmetry) in the system. Microstructural study by scanning electron microscope showed a non-uniform distribution of large grains over the sample surface and presence of a small amount of micro-size pores. Modulus and impedance studies were carried out at various frequencies (1 kHz-1 MHz) and temperatures (300-350°C) and showed the contributions of grains in capacitive and resistive properties of the material. The resistance and capacitance of the complex impedance plots are contributed by grains as observed from the Nyquist plots. The experimental data obtained from the Nyquist plot were implemented in an equivalent electrical circuit (RQC). The value of grain resistance and capacitance were obtained using fitting steps with precision at all temperatures. It is assumed that increase of dielectric constant at higher temperatures is due to the substitution of Ga + ions at the Pb-site.

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Structural, electrical and magnetic characteristics of improper multiferroic: GdFeO₃

Cited by 67 publications

References 61 publications

Studies of dielectric and electrical transport characteristics of BaTiO3-BiFeO3-CaSnO3 ternary system

Studies of dielectric and electrical transport characteristics of BaTiO3-BiFeO3-CaSnO3 ternary system

Structural and Electrical Characteristics of an Aurivillius Family Compound Bi₂LaTiVO₉

Structural and electrical characteristics of gallium modified PZT ceramics

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Structural, electrical and magnetic characteristics of improper multiferroic: GdFeO3

Cited by 67 publications

References 61 publications

Studies of dielectric and electrical transport characteristics of BaTiO3-BiFeO3-CaSnO3 ternary system

Studies of dielectric and electrical transport characteristics of BaTiO3-BiFeO3-CaSnO3 ternary system

Structural and Electrical Characteristics of an Aurivillius Family Compound Bi2LaTiVO9

Structural and electrical characteristics of gallium modified PZT ceramics

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Structural, electrical and magnetic characteristics of improper multiferroic: GdFeO₃

Structural and Electrical Characteristics of an Aurivillius Family Compound Bi₂LaTiVO₉