Phase formation in near-morphotropic region of the PbZr1 − x Ti x O3 system, structural defects, and electromechanical properties of the solid solutions

Резниченко, Л. А.; Шилкина, Л. А.; Razumovskaya, O. N.; Yaroslavtseva, E. A.; Дудкина, С. И.; Demchenko, O. A.; Yurasov, Yu. I.; Esis, A. A.; Andryushina, I. N.

doi:10.1134/s1063783409050205

Cited by 15 publications

(3 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, the existence of the intermediate monoclinic phase and its nature are not yet unanimously accepted, and it is also proposed that, besides nanoscale twinning, defect structures like planes of O vacancies may have a role in defining the microstructure of PZT and act as nuclei for intermediate phases. 53 Hence, there is a range of microstructures that may well reflect in the position of the MPB, but, again, the consistency and regularity of the data encourage to consider the features presented here as intrinsic of the PZT phase diagram and not vagaries from uncontrolled defects.…”

Section: E Kinks In the Tmpb And Tt Linesmentioning

confidence: 63%

Effects of coupling between octahedral tilting and polar modes on the phase diagram of PbZr1-xTixO3 (PZT)

Cordero,

Trequattrini,

Craciun

et al. 2012

Preprint

View full text Add to dashboard Cite

The results are presented of anelastic and dielectric spectroscopy measurements on large grain ceramic PbZr1−xTixO3 (PZT) with compositions near the two morphotropic phase boundaries (MPBs) that the ferroelectric (FE) rhombohedral phase has with the Zr-rich antiferroelectric and Ti-rich FE tetragonal phases. These results are discussed together with similar data from previous series of samples, and reveal new features of the phase diagram of PZT, mainly connected with octahedral tilting and its coupling with the polar modes. Additional evidence is provided of what we interpret as the onset of the tilt instability, when is initially frustrated by lattice disorder, and the long range order is achieved at lower temperature. Its temperature TIT (x) prosecutes the long range tilt instability line TT (x) up to TC, when TT drops. It is proposed that the difficulty of seeing the expected 1 2 111 modulations in diffraction experiments is due to the large correlation volume associated with that type of tilt fluctuations combined with strong lattice disorder.It is shown that the lines of the tilt instabilities tend to be attracted and merge with those of polar instabilities. Not only TIT bends toward TC and then merges with it, but in our series of samples the temperature TMPB of the dielectric and anelastic maxima at the rhombohedral/tetragonal MPB does not cross TT, but deviates remaining parallel or possibly merging with TT. These features, together with a similar one in Na 1/2 Bi 1/2 1−x BaxTiO3, are discussed in terms of cooperative coupling between tilt and FE instabilities, which may trigger a common phase transition. An analogy is found with recent simulations of the tilt and FE transitions in multiferroic BiFeO3 [Kornev and Bellaiche, Phys. Rev. B 79, 100105 (2009)].An abrupt change is found in the shape of the anelastic anomaly at TT when x passes from 0.465 to 0.48, possibly indicative of a rhombohedral/monoclinic boundary.

show abstract

Section: E Kinks In the Tmpb And Tt Linesmentioning

confidence: 63%

Effects of coupling between octahedral tilting and polar modes on the phase diagram of PbZr1-xTixO3 (PZT)

Cordero,

Trequattrini,

Craciun

et al. 2012

Preprint

View full text Add to dashboard Cite

show abstract

“…The aim of the present work was to study the crystal structure and peculiarities of the magnetic properties of composites containing 90% of piezoelectric lead zirconate titanate (PZT), i.e. the Pb(Ti x Zr 1-x O 3 ) [1][2][3][4] compound, and 10% of NiFe 1.98 Co 0.02 O 4 ferrite [5,6] in unpolarized and polarized states.…”

Section: Features Of the Structural And Magnetic Properties Of Pb(ti mentioning

confidence: 99%

Features of the structural and magnetic properties of Pb(Ti_xZr_1–xO₃)-NiFe_1.98Co_0.02O₄ in the polarized state

et al. 2017

View full text Add to dashboard Cite

Composites with a 90%Pb(TixZr1-xO3)-10%NiFe1.98Co0.02O4 composition have been synthesized. It has been established that the polarization of samples resulting from exposure to an electric field for 1 hour of 4 kV/mm in strength at a temperature of 400 K leads to crystal structure deformation. The compression of elementary crystal cells in some areas during polarization of the sample creates conditions suitable for the enhancement of magnetic exchange interactions. It has been found that the polarization process of such compositions leads to increases in specific magnetization and magnetic susceptibility. The analysis of Mössbauer spectra has shown that the polarization of the 90%Pb(TixZr1-xO3)-10%NiFe1.98Co0.02O4 composite leads to significant changes in the effective magnetic fields of iron subspectra in various positions.

show abstract

“…From our results of analysis of the crystal structure and electrical properties of ceramics of the considered system in the interval of concentrations 0 ≤ x ≤ 1.00 and temperatures 25°C ≤ T ≤ 700°C, the x-T phase diagram with allowance for the real SS structure were constructed [17,[20][21][22]. This structure is caused by the existence of domain and interphase boundaries, clusters of new phases, and extended planar defects arising due to the variable valence of Ti, which provokes the formation, accumulation, and ordering of oxygen vacancies and their removal by a crystallographic shear.…”

Section: Introductionmentioning

confidence: 99%

Refined phase portrait of the rhombohedral region of the x–T diagram of the Pb(Zr1–x Ti x )O3 system and singularities of dielectric spectra of its solid solutions

et al. 2015

Self Cite

View full text Add to dashboard Cite

The boundaries of the phase states of solid solutions in the rhombohedral region of the Pb(Zr 1 -x Ti x )O 3 (0 ≤ x ≤ 1.00) system and the curve of the R3c → R3m phase transition have been refined on the basis of detailed (with a small concentration step) high-temperature (25°C ≤ T ≤ 700°C) studies of the structural characteristics and frequencies of the piezoelectric resonance of the radial oscillation mode of polarized ceramic samples. It has been shown that, in the range 0.07 ≤ x ≤ 0.20, the transition curve practically coincides with the generally accepted one and, in the interval 0.20 ≤ x ≤ 0.36, it differs from the latter by a nonmonotonic behavior and agrees in the boundaries and regions of the phase states. The curve of the transition from the region of coexistence of the R-and Rh 1 -phases in the clusterized state to a region with single Rh 1 -phase in the interval of concentrations 0.08 ≤ x ≤ 0.12 and temperatures 200-250°C has been constructed. The full x-T phase diagram of the Pb(Zr 1 -x Ti x )O 3 system has been presented. Dispersion spectra of solid solutions on variation in the frequency of the measuring electric field in the interval of 25-10 6 Hz have been studied, and their correlation with singularities of the phase portrait has been established.

show abstract

Phase formation in near-morphotropic region of the PbZr1 − x Ti x O3 system, structural defects, and electromechanical properties of the solid solutions

Cited by 15 publications

References 18 publications

Effects of coupling between octahedral tilting and polar modes on the phase diagram of PbZr1-xTixO3 (PZT)

Effects of coupling between octahedral tilting and polar modes on the phase diagram of PbZr1-xTixO3 (PZT)

Features of the structural and magnetic properties of Pb(Ti_xZr_1–xO₃)-NiFe_1.98Co_0.02O₄ in the polarized state

Refined phase portrait of the rhombohedral region of the x–T diagram of the Pb(Zr1–x Ti x )O3 system and singularities of dielectric spectra of its solid solutions

Contact Info

Product

Resources

About

Phase formation in near-morphotropic region of the PbZr1 − x Ti x O3 system, structural defects, and electromechanical properties of the solid solutions

Cited by 15 publications

References 18 publications

Effects of coupling between octahedral tilting and polar modes on the phase diagram of PbZr1-xTixO3 (PZT)

Effects of coupling between octahedral tilting and polar modes on the phase diagram of PbZr1-xTixO3 (PZT)

Features of the structural and magnetic properties of Pb(TixZr1–xO3)-NiFe1.98Co0.02O4 in the polarized state

Refined phase portrait of the rhombohedral region of the x–T diagram of the Pb(Zr1–x Ti x )O3 system and singularities of dielectric spectra of its solid solutions

Contact Info

Product

Resources

About

Features of the structural and magnetic properties of Pb(Ti_xZr_1–xO₃)-NiFe_1.98Co_0.02O₄ in the polarized state