Electric relaxation and Mn3+/Mn4+ charge transfer in Fe-doped Bi12MnO20–BiMn2O5 structural self-composite

Leonarska, A.; Kądziołka-Gaweł, Mariola; Szeremeta, Anna Z.; Bujakiewicz-Korońska, Renata; Калване, А.; Molak, A.

doi:10.1007/s10853-016-0515-2

Cited by 27 publications

(17 citation statements)

References 42 publications

(86 reference statements)

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“…One phase, BiMn 2 O 5 , consists of octahedrons and pyramids. The second phase, Bi 12 MnO 20 , is dominated by Bi ions and contains BiO 4 tetrahedrons . It is worth mentioning that Bi 12 MnO 20 phase is structurally related to the bismuth oxide, δ‐Bi 2 O 3, structure .…”

Section: Introductionmentioning

confidence: 99%

“…It is worth mentioning that Bi 12 MnO 20 phase is structurally related to the bismuth oxide, δ‐Bi 2 O 3, structure . Electrical features of ceramic and single crystal forms of the BiMn 2 O 5 compound were studied using broadband dielectric spectroscopy. Two relaxations were discerned in the 100‐450 K temperature range.…”

Section: Introductionmentioning

confidence: 99%

“…The second phase, Bi 12 MnO 20 , is dominated by Bi ions and contains BiO 4 tetrahedrons. 10,13,14 It is worth mentioning that Bi 12 MnO 20 phase is structurally related to the bismuth oxide, δ-Bi 2 O 3, structure. 15 Electrical features of ceramic 13,14,16 and single crystal 17 forms of the BiMn 2 O 5 compound were studied using broadband dielectric spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

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Hydrostatic pressure influence on electric relaxation response of bismuth manganite ceramics

et al. 2020

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Electrical impedance of bismuth manganite ceramics was studied under ambient and high hydrostatic pressure. Local disorder of crystal lattice was confirmed using XRD and DSC. Two relaxation processes were discerned. One was attributed to small polarons, which showed a changeover from variable range hopping features related to Fermi glass and structural disorder to the nearest neighbor hopping behavior in higher temperature range related to uniform distribution of energy levels. Hydrostatic pressure shortened relaxation times that would be interesting for applications. The second process, which was assigned to the nearest neighbor hopping of polarons, also exhibited a changeover to glassy features in a high‐temperature range.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydrostatic pressure influence on electric relaxation response of bismuth manganite ceramics

et al. 2020

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“…The conductivity in these bulk materials is because of ionic conduction mechanism and governed by the mobility of bismuth (Bi) ions 10 . Effect of calcination on structural properties and consequently on the electrical properties for bulk BiSiO materials have been reported earlier 11,12 .…”

Section: Synthesis Of Bismuth Silicate (Bisio) Nanostructuresmentioning

confidence: 85%

Study of electric conduction mechanisms in bismuth silicate nanofibers

Batool

Imran

Rasool

et al. 2020

Sci Rep

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This work represents the nature of conduction mechanism in bismuth silicate (BiSiO) nanofibers as a function of temperature and frequency. Scanning electron micrographs and X-rays diffraction patterns exhibited the formation of cubic phases of Bi 4 (Sio 4 ) 3 and Bi 12 Sio 20 nanofibers respectively with an average diameter of ~200 nm. Temperature dependent (300 K-400 K) electrical characterization of fibers was carried out in frequency range of ~20 Hz-2 MHz. The complex impedance analysis showed contribution from bulk and intergranular parts of nanofibers in conduction. Moreover, analysis of the Cole-Cole plot confirmed the space charge dependent behavior of BiSiO nanofibers. Two types of relaxation phenomena were observed through Modulus analysis. In ac conductivity curve, step like feature of plateau and dispersive regions were described by Maxwell-Wagner effect while the dc part obeyed the Arrhenius law. However, frequency dependent ac conductivity revealed the presence of conduction mechanism in diverse regions that was ascribed to large polaron tunneling model. Detailed analysis of complex Impedance and ac conductivity measurement showed negative temperature coefficient of resistance for the BiSiO nanofibers. Current-voltage (IV) characteristics represented ohmic conduction; followed by space charge limited current conduction at intermediate voltages. Results from both ac and dc measurements were in good agreement with each other.

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“…The BiMn 2 O 5based component exhibited orthorhombic centrosymmetric Pbam symmetry. The BiMn 2 O 5 structure consisted of Mn 3+ O 5 square pyramids and Mn 4+ O 6 octahedrons [2,[13][14][15]. The XRD measurement showed that in the 0.98 PZT-0.02 BM, a phase transition occurs between two FE rhombohedral phases with point group symmetries of R3c and R3m [3].…”

Section: Introductionmentioning

confidence: 99%

The composition induced crossover in nonlinear dielectric response in (1 − x) Pb(Zr0.70Ti0.30)O3–x BiMn2O5 (x = 0, 0.02, 0.055, 0.11, 0.15, 0.22, and 1) ceramics

2020

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Ceramics based on lead zirconate-titanate Pb(Zr 0.70 Ti 0.30)O 3 (PZT), bismuth manganite (BM) and the composite (1 − x) PZT-x BM were obtained. A systematic study of linear and nonlinear dielectric susceptibilities temperature and frequency dependences was conducted. A composition-induced crossover in nonlinear dielectric susceptibility was detected. The so-called scaled nonlinear susceptibility, a 3 , was obtained from experimental values of the real part of the linear and third-order nonlinear dielectric susceptibilities. The value for a 3 was negative for low BM content in the whole temperature range specific to discontinuous ferroelectric phase transitions and relaxor behavior. In contradiction, a 3 was positive for BM and for the composite with sufficiently high BM content. The positive a 3 was attributed to a subsystem of dipoles created by trapped charges. Hopping charge transfer, which is a dominant mechanism for conduction in manganites, is responsible for the positive a 3 and for the colossal magnitude of the imaginary part of the linear dielectric susceptibility. The concentration of the ions was determined using scanning electron microscopy. The chemical disorder and the precipitation of ions determined using time of flight-secondary ion mass spectrometry correspond to a crossover in the electrical features.

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Electric relaxation and Mn3+/Mn4+ charge transfer in Fe-doped Bi12MnO20–BiMn2O5 structural self-composite

Cited by 27 publications

References 42 publications

Hydrostatic pressure influence on electric relaxation response of bismuth manganite ceramics

Hydrostatic pressure influence on electric relaxation response of bismuth manganite ceramics

Study of electric conduction mechanisms in bismuth silicate nanofibers

The composition induced crossover in nonlinear dielectric response in (1 − x) Pb(Zr0.70Ti0.30)O3–x BiMn2O5 (x = 0, 0.02, 0.055, 0.11, 0.15, 0.22, and 1) ceramics

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