Possible incipient ferroelectricity in Mn-doped Na1/2Bi1/2Cu3Ti4O12

Ferrarelli, Matthew C.; Sinclair, Derek C.; West, Anthony R.
May 2009
Applied Physics Letters;5/25/2009, Vol. 94 Issue 21, p212901
Academic Journal
The grain semiconductivity of Na1/2Bi1/2Cu3Ti4O12 ceramics is suppressed by several orders of magnitude by Mn-doping and Na1/2Bi1/2Cu2.82Mn0.18Ti4O12 ceramics exhibit high room temperature relative permittivity, [variant_greek_epsilon]r, ∼140. [variant_greek_epsilon]r data at 100 kHz fit the Barrett equation over the range ∼10–320 K and the magnitude and temperature dependence of [variant_greek_epsilon]r are consistent with incipient ferroelectricity in this compound.


Related Articles

  • Damage to TGS crystals caused by hydrostatic pressure. STANKOWSKI, J.; WAPLAK, S. // Materials Science (0137-1339);2009, Vol. 27 Issue 1, p249 

    In this letter we address a particular aspect of the finite size effect on ferroelectric instability: the polarization suppression under high hydrostatic pressure. We have shown that in TGS ([NH3+CH2COOH)2 (NH3+CH2COO-)SO42-) single crystals under high pressure the critical temperature Tc of...

  • Dielectric anomaly due to electrostatic coupling in ferroelectric-paraelectric bilayers and multilayers. Roytburd, A. L.; Zhong, S.; Alpay, S. P. // Applied Physics Letters;8/29/2005, Vol. 87 Issue 9, p092902 

    A thermodynamic model is presented that describes the polarization and the dielectric response of ferroelectric-paraelectric bilayers and multilayers. It is shown that a strong electrostatic coupling between the layers results in the suppression of ferroelectricity at a critical paraelectric...

  • From Ferroelectric to Quantum Paraelectric: KTa1-xNbxO3 (KTN), A Model System. Samara, G. A. // AIP Conference Proceedings;2004, Vol. 706 Issue 1, p176 

    The mixed perovskite oxides KTa1-xNbxO3, or KTN, are a model system for studying ferroelectric behavior and phase transitions under pressure. Crystals with x > 0.1 exhibit ferroelectric soft-mode behavior and a sequence of phase transitions, while for x ≤ 0.02 a pressure-induced...

  • Theoretical description of ferroelectric and pyroelectric hystereses in the disordered ferroelectric-semiconductor films. Morozovska, A. N.; Eliseev, E. A.; Remiens, D.; Soyer, C. // Journal of Applied Physics;7/1/2006, Vol. 100 Issue 1, p014109 

    We have modified the Landau-Khalatnikov approach and shown that both the polar lattice and the screened charged defects determine the response of disordered ferroelectric semiconductors. This system exhibits the spatially inhomogeneous switching under the external field while the...

  • Depolarization in modeling nano-scale ferroelectrics using the Landau free energy functional. Woo, C. H.; Yue Zheng // Applied Physics A: Materials Science & Processing;Apr2008, Vol. 91 Issue 1, p59 

    We derived thermodynamically from first principles the free energy functional of a ferroelectric under an applied field E that contains the depolarization field E d. We found that it is crucial to recognize the relationship between the total polarization and the applied field due to the...

  • A lead-free high-TC ferroelectric BaTi2O5: A first-principles study. Waghmare, Umesh; Sluiter, Marcel H. F.; Kimura, Telichi; Goto, Takashi; Kawazoe, Yoshiyuki // Applied Physics Letters;6/14/2004, Vol. 84 Issue 24, p4917 

    Previous experimental indications of ferroelectricity with Curie temperature (TC) of 747 K in BaTi2O5 are confirmed through assessment of its structural stability and estimation of its spontaneous polarization using first-principles density functional theory calculations. The present work...

  • Relaxation of induced polar state in relaxor PbMg1/3Nb2/3O3 thin films studied by piezoresponse force microscopy. Shvartsman, V. V.; Kholkin, A. L.; Tyunina, M.; Levoska, J. // Applied Physics Letters;5/30/2005, Vol. 86 Issue 22, p222907 

    Polarization state in epitaxial thin films of relaxor ferroelectric PbMg1/3Nb2/3O3 (PMN) was experimentally studied at the nanoscale using a piezoresponse force microscopy (PFM). In the absence of a dc bias applied to the PFM tip, no piezoelectric activity could be found on most of the surface...

  • Observation of ferroelectric domain patterns in nanocrystalline BaTiO3 ceramics. Xiangyun Deng; Xiaohui Wang; Liangliang Chen; Hai Wen; Longtu Li // Applied Physics Letters;10/9/2006, Vol. 89 Issue 15, p152901 

    Scanning nonlinear dielectric microscopy measurements revealed temperature-dependent variations in contrast, which was attributed to domain rearrangements in 20 nm BaTiO3 ceramics. The experiment result showed the presence of a-c 90° nanoferroelectric domains in 20 nm BaTiO3 ceramics from 25...

  • Relaxor ferroelectricity in strained epitaxial SrTiO3 thin films on DyScO3 substrates. Biegalski, M. D.; Jia, Y.; Schlom, D. G.; Trolier-McKinstry, S.; Streiffer, S. K.; Sherman, V.; Uecker, R.; Reiche, P. // Applied Physics Letters;5/8/2006, Vol. 88 Issue 19, p192907 

    The ferroelectric properties of 500 Å thick strained, epitaxial SrTiO3 films grown on DyScO3 substrates by reactive molecular-beam epitaxy are reported. Despite the near 1% biaxial tensile strain, the x-ray rocking curve full widths at half maximum in ω are as narrow as 7 arc sec...


Read the Article


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

Try another library?
Sign out of this library

Other Topics