Mechanism of 1:1 nonstoichiometric short-range ordering in La-doped Pb(Mg1/3Nb2/3)O3 relaxor ferroelectrics

Lee, Kyu-Mann; Jang, Hyun M.; Park, Woojin

doi:10.1557/jmr.1997.0220

Cited by 45 publications

(14 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the point of application, the degree of DPT is essential for precision displacement controllers and MLCCs [7]. Lanthanum doping on the A-site of PMN-based relaxor system has been investigated by several workers in some details [8]. The results demonstrate that the thermostability of electrostriction and dielectric permittivity can be improved by La-doping, thus enhancing the degree of diffuse phase transition (DPT).…”

Section: Introductionmentioning

confidence: 99%

Dielectric and ferroelectric properties of PZN–PZT ceramics with lanthanum doping

Zeng¹,

He²,

Cheng³

et al. 2009

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Dielectric and ferroelectric properties of PZN–PZT ceramics with lanthanum doping

Zeng¹,

He²,

Cheng³

et al. 2009

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…According to the earlier studies, 15,18,38 donor doping in the A-site (e.g., by La 3+ ions) promotes the growth of the 1:1 ordered domains by reducing the charge imbalance. This doping does not increase the number density of the ordered nanodomains but does promote the growth of the size of the ordered domains.…”

Section: Resultsmentioning

confidence: 93%

A New Mechanism of Nonstoichiometric 1:1 Short‐Range Ordering in NiO‐Doped Pb(Mg1/3Nb2/3)O3 Relaxor Ferroelectrics

Lee

Jang

1998

Journal of the American Ceramic Society

Self Cite

View full text Add to dashboard Cite

A new mechanism of the nonstoichiometric, 1:1 short-range ordering, which leads to enhanced diffuse phase transition (DPT), was proposed and tested using NiO-doped Pb(Mg 1/3 Nb 2/3 )O 3 as a model system for Pb(B 1/3 B؆ 2/3 )O 3 -type relaxor ferroelectrics. The enhanced DPT and the increase in the intensity of {h+ 1 ⁄2,k+ 1 ⁄2,l+ 1 ⁄2}-type superlattice reflection both were observed in the presence of NiO. These observations were interpreted as the increase in the number density of the short-range-ordered nanodomains without the domain growth. The mechanism of the atomic defect responsible for the increase in the number density of the 1:1 ordered nanodomains was investigated by analyzing the electrical conductivity as a function of the partial pressure of oxygen. It was shown that the substitution of Ni 2+ ions for Nb 5+ ions in the B-site sublattice of perovskite PMN produced Ni Nb ٟ sites with a concomitant generation of positively charged oxygen vacancies (V ⅐ ⅐ O ) for the ionic-charge compensation. This defect process will stabilize the negatively charged nonstoichiometric 1:1 short-range-ordered domains and, thus, increase the number density of the ordered nanodomains in a disordered matrix.

show abstract

“…The growth increases the separation between disordered matrix. Thus the DPT behaviour can be consistently enhanced [19,20].…”

Section: Dielectric Propertiesmentioning

confidence: 94%

Synthesis and Piezoelectric Properties of Pb0.98Sm0.02[(Zry,Ti1–y)0.98(Fe1/23+,Nb1/25+)0.02]O3<

Kahoul¹,

Hamzioui²,

Abdessalem³

et al. 2012

MSA

View full text Add to dashboard Cite

Nb  ) 0.02 ]O 3 ceramics system with the composition near the morphotropic phase boundary were investigated as a function of the Zr/Ti ratio by X-ray diffraction (XRD). Studies were performed on the samples prepared by solid state reaction for y = 0.47, 0.49, 051, 0.53, 0.55 and 0.57. Combined with piezoelectric properties results, it was consistently shown that an MPB exists between y = 0.51 and y = 0.55 in this system. When y < 0.51, the tetragonal phase dominates at ambient temperatures. In the range of y > 0.55, the rhombohedral phase dominates. Lattice parameters of the tetragonal phase and rhombohedral phase were found to vary with chemical composition. The average particle size ranged from 17.18 to 26.05 nm. The dielectric (ε = 1076), tanδ = 0.013 and piezoelectric properties (d 31 = 122 pC/N, kp = 0.631 and Qm = 462) obtained were maximum at y = 0.55 which could be suitable for possible electromechanical and energy harvesting applications.

show abstract

Mechanism of 1:1 nonstoichiometric short-range ordering in La-doped Pb(Mg_1/3Nb_2/3)O₃ relaxor ferroelectrics

Cited by 45 publications

References 16 publications

Dielectric and ferroelectric properties of PZN–PZT ceramics with lanthanum doping

Dielectric and ferroelectric properties of PZN–PZT ceramics with lanthanum doping

A New Mechanism of Nonstoichiometric 1:1 Short‐Range Ordering in NiO‐Doped Pb(Mg1/3Nb2/3)O3 Relaxor Ferroelectrics

Synthesis and Piezoelectric Properties of Pb<sub>0.98</sub>Sm<sub>0.02</sub>[(Zr<sub>y</sub>,Ti<sub>1–y</sub>)<sub>0.98</sub>(Fe<sub>1/2</sub><sup>3+</sup>,Nb<sub>1/2</sub><sup>5+</sup>)<sub>0.02</sub>]O<sub>3<

Contact Info

Product

Resources

About