Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/4523
Title: Enhanced piezoelectric and pyroelectric effects in single-phase multiferroic Bi[sub 1−x]Nd[sub x]FeO₃ (x = 0–0.15)
Authors: Yuan, GL
Or, DSW 
Issue Date: 6-Feb-2006
Source: Applied physics letters, 6 Feb. 2006, v. 88, no. 6, 062905, p. 1-3
Abstract: Single-phase multiferroic Bi[sub1−x]Nd[subx]FeO₃ (x = 0–0.15) ceramics are polarized and their piezoelectric and pyroelectric effects are reported. The success in polarizing the ceramics originates from low electrical conductivities controlled predominantly by the Poole-Frenkel conduction mechanism. Limited internal traps due to reduced oxygen vacancies in the ceramics result in sufficiently low leakage current densities of <30 mA/m² even at a high electric field of 145 kV/cm. The piezoelectric d₃₃ coefficients of the ceramics before and after annealing at 550 °C for 4 h are measured to be ∼ 28 and ∼ 24 pC/N, respectively. These values are higher than those of most major lead-free high-temperature piezoelectric ceramics.
Keywords: Bismuth compounds
Neodymium compounds
Piezoceramics
Ferroelectric ceramics
Multiferroics
Pyroelectricity
Dielectric polarisation
Electrical conductivity
Poole-Frenkel effect
Vacancies (crystal)
Leakage currents
Current density
Annealing
Publisher: American Institute of Physics
Journal: Applied physics letters 
ISSN: 0003-6951
EISSN: 1077-3118
DOI: 10.1063/1.2169905
Rights: © 2006 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in G. L. Yuan et al., Appl. Phys. Lett. 88, 062905 (2006) and may be found at http://link.aip.org/link/?apl/88/062905
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