Dielectric relaxations and dielectric response in multiferroic BiFeO3 ceramics

Hunpratub, Sitchai; Thongbai, Prasit; Yamwong, Teerapon; Yimnirun, Rattikorn; Maensiri, Santi
February 2009
Applied Physics Letters;2/9/2009, Vol. 94 Issue 6, pN.PAG
Academic Journal
Single-phase multiferroic BiFeO3 ceramics were fabricated using pure precipitation-prepared BiFeO3 powder. Dielectric response of BiFeO3 ceramics was investigated over a wide range of temperature and frequency. Our results reveal that the BiFeO3 ceramic sintered at 700 °C exhibited high dielectric permittivity, and three dielectric relaxations were observed. A Debye-type dielectric relaxation at low temperatures (-50 to 20 °C) is attributed to the carrier hopping process between Fe2+ and Fe3+. The other two dielectric relaxations at the temperature ranges 30–130 °C and 140–200 °C could be due to the grain boundary effect and the defect ordering and/or the conductivity, respectively.


Related Articles

  • Colossal dielectric constant and relaxation behaviors in Pr:SrTiO3 ceramics. Cheng Liu; Peng Liu; Jian-ping Zhou; Ying He; Li-na Su; Lei Cao; Huai-wu Zhang // Journal of Applied Physics;May2010, Vol. 107 Issue 9, p094108-1 

    Sr1-xPrxTiO3 ceramics (0.00⩽x⩽0.03) were prepared by a traditional solid-state reaction method. Two relaxation processes (marked as A and B) of the Sr0.09Pr0.01TiO3 ceramics were investigated by analyzing the Ea values obtained from the Arrhenius law. Colossal dielectric constant (CDC)...

  • Large dielectric permittivity in the paraelectric RMn2O5 with R=Tb, Dy, and Er. Han, T. C.; Lin, J. G.; Kuo, K. M.; Chern, G. // Journal of Applied Physics;Apr2008, Vol. 103 Issue 8, p084106 

    The complex dielectric permittivities ([variant_greek_epsilon]′,[variant_greek_epsilon]″) of RMn2O5 (R=Tb, Dy, and Er) are measured in the temperature range of 78–328 K with frequencies ranging from 100 Hz to 1 MHz. A large real part of the dielectric constant...

  • Two distinct dielectric relaxation mechanisms in the low-frequency range in Bi5TiNbWO15 ceramics. Yi, Z. G.; Li, Y. X.; Wang, Y.; Yin, Q. R. // Applied Physics Letters;4/17/2006, Vol. 88 Issue 16, p162908 

    The ac data in terms of impedance and dielectric loss (tan δ) were exploited simultaneously to probe the dielectric relaxation mechanisms in Bi5TiNbWO15 ceramics. It was found that two distinct relaxation mechanisms exist in the low-frequency range (10 Hz–5 MHz). One is attributed to...

  • Dielectric properties of BaTiO-Bi(ZnTi)O-NaNbO solid solutions. Raengthon, Natthaphon; Brown-Shaklee, Harlan; Brennecka, Geoff; Cann, David // Journal of Materials Science;Mar2013, Vol. 48 Issue 5, p2245 

    In order to develop dielectric ceramics with temperature-stable permittivity characteristics, perovskite BaTiO-Bi(ZnTi)O-NaNbO ceramic solid solutions were investigated with a particular focus on effects of BaTiO and NaNbO contents on the dielectric properties of ternary compounds. Keeping the...

  • Influence of BiO addition on structure and dielectric properties of Ag(NbTa)O ceramics. Cao, Lifeng; Li, Lingxia; Zhang, Ping; Wang, Hongru // Materials Science (0137-1339);2011, Vol. 29 Issue 1, p1 

    The structure and dielectric properties of perovskite Ag(NbTa)O ceramics were explored. A small amount of BiO was used to modify the dielectric properties of the ceramics. The addition of BiO led the ceramics to a high densification and optimal dielectric properties. With the addition of 4.5 wt%...

  • Microwave permittivity and permeability experiments in high-loss dielectrics: Caution with implicit Fabry-Pérot resonance for negative imaginary permeability. Hou, Zhi-Ling; Zhang, Min; Kong, Ling-Bao; Fang, Hui-Min; Li, Zhong-Jun; Zhou, Hai-Feng; Jin, Hai-Bo; Cao, Mao-Sheng // Applied Physics Letters;10/14/2013, Vol. 103 Issue 16, p162905 

    Various materials have been examined to obtain permittivity and permeability values required for detailed investigations on functional materials like microwave-absorbing and high-permittivity dielectrics. We call for caution when samples exhibit negative imaginary permeability, whether...

  • Prenematic Self-Assembling of Mesogenic Molecules in Isotropic Liquid and Orientational Order in Nematic Phase. Wolarza;¤, E.; Baumana, D.; Jadzyn, J.; Dabrowski, R. // Acta Physica Polonica, A.;Sep2011, Vol. 120 Issue 3, p447 

    Dielectric relaxation study of nematogenic 4-n-alkyl-4′-cyanobiphenyls (nCB, n = 5, 6), 4-(trans-4′-n-alkylcyclohexyl) isothiocyanatobenzenes (nCHBT, n = 6, 8), 4-cyanophenyl-4′-n-alkylbenzoates (nCPB, n = 6, 8), 4-cyano-3-fluorophenyl-4′-n-octyloxybenzoate (8OCFPB), and...

  • Influence of the prehistory of NaNbO3-Gd1/3NbO3 ceramics and single crystals on their dielectric properties. Burkhanov, A.; Bondarenko, P.; Raevskaya, S.; Shil’nikov, A.; Raevskiĭ, I. // Physics of the Solid State;Jun2006, Vol. 48 Issue 6, p1114 

    The dielectric properties of a ceramic and a single crystal of the same composition 0.9NaNbO3-0.1Gd1/3NbO3 (NNG10) with different prehistories of the material are investigated in the low-and infralow-frequency ranges. It is revealed that the dielectric aging of the material based on the NaNbO3...

  • Crystalline structure and dielectric properties of Ba(Ti1-yCey)O3. Zhi Jing; Zhi Yu; Ang, Chen // Journal of Materials Science;Mar2003, Vol. 38 Issue 5, p1057 

    Crystalline structure, microstructure and dielectric properties for Ba(Ti1-yCey)O3 (0 ≤ y ≤ 0.5) ceramics have been studied. Dense ceramics with the relative density higher than 95% and grain size of 0.7-1.5 µm have been obtained. The limit of the solid solubility is determined as...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics