Publication: Effects of Gd<sup>3+</sup> doping on structural and dielectric properties of PZT (Zr:Ti = 52:48) piezoceramics
Issued Date
2005-12-01
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ISSN
14346036
14346028
14346028
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2-s2.0-29344465424
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Mahidol University
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SCOPUS
Bibliographic Citation
European Physical Journal B. Vol.48, No.3 (2005), 367-372
Suggested Citation
L. Pdungsap, S. Boonyeun, P. Winotai, N. Udomkan, P. Limsuwan Effects of Gd<sup>3+</sup> doping on structural and dielectric properties of PZT (Zr:Ti = 52:48) piezoceramics. European Physical Journal B. Vol.48, No.3 (2005), 367-372. doi:10.1140/epjb/e2005-00407-9 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/16623
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Title
Effects of Gd<sup>3+</sup> doping on structural and dielectric properties of PZT (Zr:Ti = 52:48) piezoceramics
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Abstract
The purpose of this research is to study the effect of doping Gd into Pb(Zr0.52Ti0.48)O3 ceramics prepared by solid state reaction. X-ray diffraction patterns show that all PGZT samples are of tetragonal structure and the highest doping should be no more than 2 mole∈% Gd at which the unreacted oxides start to appear. The electron spin resonance (ESR) spectra of PGZT's indicate that Gd3+ can enter both A site of the perovskite structure instead of only A site as widely believed. The ESR peaks resonance shift towards low fields as the concentration is higher, which is due to the change in crystal field experienced by Gd3+ ions. At x =0.001, 0.005 and 0.01 dopings, two sets of powder ESR signals arising from Gd3+ (4f7, spin 7/2) ions at A site. The first set shows some fine structure having strong absorption peaks centered at 76.26 mT (g = 8.550). The second is a seven-peak spectrum centered at 206.01 mT (g = 3.165), which belongs to the Gd3+ ions at B sites. Furthermore, the overlapped ESR strong absorption peaks from 309.17 mT to 314.49 mT (g = 2.2818-2.1087) belong to Gd3+ of unreacted Gd2O 3. The local environments of Gd3+ ions were verified from the calculated ESR spectra using appropriate spin Hamiltonian parameter, i.e. gyromagnetic tensor g, zero-field splitting D and hyperfine tensor A.