Impedance spectroscopy of Gd-doped BiFeO3 multiferroics

Pattanayak, Samita; Parida, B. N.; Das, Piyush R.; Choudhary, R. N. P.

doi:10.1007/s00339-012-7412-6

Cited by 182 publications

(39 citation statements)

References 22 publications

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“…An equivalent circuit consists of parallel combination of CQR and CR, where Q is called constant phase element (CPE). The presence of non-semicircle indicates the existence of non-Debye type of relaxation in the sample [22,23]. For Debye-type relaxation, a semicircle with its center at Z' axis is observed.…”

Section: Impedance Analysismentioning

confidence: 91%

Tailoring of electrical properties of BiFeO3 by praseodymium

et al. 2013

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Abstract:The polycrystalline samples of Bi 1x Pr x FeO 3 (x = 0 and 0.1) were prepared by a solid-state reaction technique. Preliminary X-ray structural analysis has confirmed the formation of a single-phase compound. Studies of dielectric and impedance spectroscopy of the materials, carried out in wide frequency (1 kHz-1 MHz) and temperature (25-400 ℃ ) ranges, have provided many interesting results including significant decrement in tangent loss, structural stability, obeying Jonscher's universal power law, etc.

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Section: Impedance Analysismentioning

confidence: 91%

Tailoring of electrical properties of BiFeO3 by praseodymium

et al. 2013

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“…Hence, the space charge polarization is reduced at higher frequency leading to a merge of curves at higher frequency. 26 The decrease in magnitude of Z 0 in the low-frequency region with rise in temperature shows J. Rout & R. N. P. Choudhary J. Adv. Dielect.…”

Section: Resultsmentioning

confidence: 99%

Study of multiferroic properties of Bi₂Fe₂WO₉ ceramic for device application

Rout

Choudhary

2016

J. Adv. Dielect.

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The Bi 2 Fe 2 WO 9 ceramic was prepared using a standard solid-state reaction technique. Preliminary analysis of X-ray diffraction pattern revealed the formation of single-phase compound with orthorhombic crystal symmetry. The surface morphology of the material captured using scanning electron microscope (SEM) exhibits formation of a densely packed microstructure. Comprehensive study of dielectric properties showed two anomalies at 200 C and 450 C: first one may be related to magnetic whereas second one may be related to ferroelectric phase transition. The field dependent magnetic study of the material shows the existence of small remnant magnetization (M r ) of 0.052 em/g at room temperature. The existence of magneto-electric (ME) coupling coefficient along with above properties confirms multi-ferroic characteristics of the compound. Selected range temperature and frequency dependent electrical parameters (impedance, modulus, conductivity) of the compound shows that electric properties are correlated to its microstructure. Detailed studies of frequency dependence of ac conductivity suggest that the material obeys Jonscher's universal power law.

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“…The broadening of peaks indicates the distribution of relaxation time. The asymmetric broadening of the peaks exhibits the presence of non-Debye type of relaxation in the material [30]. Figure 8 shows the complex impedance plots (Z 00 vs. Z 0 ), usually referred as Nyquist plot [31], over a wide range of frequency (1 kHz-1 MHz) for the different samples of (BiFeO 3 ) 1-x ?…”

Section: Impedance Analysismentioning

confidence: 99%

Structural and electrical properties of BiFeO3–PbTiO3 system

Panda

Pattanayak²,

Choudhary

2015

J Mater Sci: Mater Electron

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The polycrystalline samples of lead titanatemodified bismuth ferrite [i.e., (BiFeO 3 ) 1-x ? (PbTiO 3 ) x with x = 0.0, 0.1, 0.2, 0.3] were synthesized by a hightemperature solid-state reaction route. The formation of the materials was confirmed through basic structural analysis using X-rays diffraction data collected at room temperature. Detailed studies of dielectric and impedance characteristics of the materials in a wide frequency (1 kHz-1 MHz) and temperature (30-500°C) ranges using complex impedance spectroscopic method have provided many new results. The frequency dependence of ac conductivity suggests that the samples obey Jonscher's universal power law. A strong corelation between the micro-structural and impedance parameters was observed. The frequency-temperature dependence of electric modulus and impedance parameters of the materials shows the presence of non-Debye type of relaxation.

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Impedance spectroscopy of Gd-doped BiFeO3 multiferroics

Cited by 182 publications

References 22 publications

Tailoring of electrical properties of BiFeO3 by praseodymium

Tailoring of electrical properties of BiFeO3 by praseodymium

Study of multiferroic properties of Bi₂Fe₂WO₉ ceramic for device application

Structural and electrical properties of BiFeO3–PbTiO3 system

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Impedance spectroscopy of Gd-doped BiFeO3 multiferroics

Cited by 182 publications

References 22 publications

Tailoring of electrical properties of BiFeO3 by praseodymium

Tailoring of electrical properties of BiFeO3 by praseodymium

Study of multiferroic properties of Bi2Fe2WO9 ceramic for device application

Structural and electrical properties of BiFeO3–PbTiO3 system

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Study of multiferroic properties of Bi₂Fe₂WO₉ ceramic for device application