Abstract
Single-phase multiferroic Bi1-x Ndx Fe O3 (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 kVcm. The piezoelectric d33 coefficients of the ceramics before and after annealing at 550 °C for 4 h are measured to be ∼28 and ∼24 pCN, respectively. These values are higher than those of most major lead-free high-temperature piezoelectric ceramics.
Original language | English |
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Article number | 062905 |
Journal | Applied Physics Letters |
Volume | 88 |
Issue number | 6 |
DOIs | |
Publication status | Published - 1 Feb 2006 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)