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Noheda, Beatriz; Cereceda, N.; Iglesias, T.; Lifante, G.; Gonzalo, Julio A.; Chen, Hui Ting; Wang, Yong Ling

doi:10.1103/physrevb.51.16388

Cited by 32 publications

(20 citation statements)

References 8 publications

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“…With sixth-order terms and following [140,162], ðb Ã þ b 0 Ã Þ\ 0 and b 0 Ã [ 0 can give the sequence of stability with falling temperature to be cubic-tetragonal-orthorhombicrhombohedral. The strain data confirm that in the vicinity of the MPB, at least, the system is close also to the tricritical limit, ðb Ã þ b 0 Ã Þ ¼ 0, as expected from the known proximity of the tricritical point [14,15,19,73,106].…”

Section: Appendix: Formal Strain Analysissupporting

confidence: 63%

“…order but close to a tricritical point [14][15][16][17][18][19]. The same transition extends along the PT-PFN binary [20].…”

Section: Phase Transitions and Location Of The Morphotropic Phase Boumentioning

confidence: 97%

“…A tricritical point, marking the change from continuous (Zr-rich compositions) to discontinuous (Tirich compositions) character for the ferroelectric transition, exists close to the 50:50 composition in PZT (Pb(Zr 0.49 Ti 0.51 )O 3 [14,15,19,73] [74]). It is not accidental that this occurs close to the MPB because the crossover between stability fields for tetragonal and rhombohedral structures is also determined by one of the fourth-order coefficients in the Landau 246 potential tending to zero ( [75][76][77] and see Appendix of this paper).…”

Section: Ternary Compositionsmentioning

confidence: 99%

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Elastic and anelastic relaxation behaviour of perovskite multiferroics I: PbZr0.53Ti0.47O3 (PZT)–PbFe0.5Nb0.5O3 (PFN)

et al. 2016

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Perovskites in the ternary system PbTiO 3 (PT)-PbZrO 3 (PZ)-Pb(Fe 0.5 Nb 0.5 )O 3 (PFN) have attracted close interest because they can display simultaneous ferroelectric, magnetic and ferroelastic properties. Those with the most sensitive response to external fields are likely to have compositions near the morphotropic phase boundary (MPB) which lies close to the binary join Pb(Zr 0.53 Ti 0.47 )O 3 (PZT)-PFN. In the present study, the strength and dynamics of strain coupling behaviour which accompanies the development of ferroelectricity and (anti)ferromagnetism in ceramic PZT-PFN samples have been investigated by resonant ultrasound spectroscopy. Elastic softening ahead of the cubic-tetragonal transition does not fit with models based on dispersion of the soft mode or relaxor characteristics but is attributed, instead, to coupling between acoustic modes and a central peak mode from correlated relaxations and/or microstructure dynamics. Softening of the shear modulus through the transition by up to *50 % fits with the expected pattern for linear/quadratic strain/order parameter coupling at an improper ferroelastic transition and close to tricritical evolution for the order parameter. Superattenuation of acoustic resonances in a temperature interval of *100 K below the transition point is indicative of mobile ferroelastic twin walls. By way of contrast, the first-order tetragonalmonoclinic transition involves only a small change in the shear modulus and is not accompanied by significant changes in acoustic dissipation. The dominant Address correspondence to E-mail: mc43@esc.cam.ac.uk DOI 10.1007/s10853-016-0280-2 J Mater Sci (2016) 51:10727-10760 feature of the elastic and anelastic properties at low temperatures is a concaveup variation of the shear modulus and relatively high loss down to the lowest temperature, which appears to be the signature of materials with substantial local strain heterogeneity and a spectrum of strain relaxation times. No evidence of magnetoelastic coupling has been found, in spite of the samples displaying ferromagnetism below *550 K and possible spin glass ordering below *50 K. For the important multiferroic perovskite ceramics with compositions close to the MPB of ternary PT-PZ-PFN, there must be some focus in future on the role of strain heterogeneity.

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Section: Appendix: Formal Strain Analysissupporting

confidence: 63%

“…order but close to a tricritical point [14][15][16][17][18][19]. The same transition extends along the PT-PFN binary [20].…”

Section: Phase Transitions and Location Of The Morphotropic Phase Boumentioning

confidence: 97%

Section: Ternary Compositionsmentioning

confidence: 99%

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Elastic and anelastic relaxation behaviour of perovskite multiferroics I: PbZr0.53Ti0.47O3 (PZT)–PbFe0.5Nb0.5O3 (PFN)

et al. 2016

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“…Later, several studies in the F RL and the F RH structures were performed. [7][8][9] These results indicated that the increase of the spontaneous polarization near the F RL -F RH phase transition is related to the O 3 tilt coupling to cation shifts along ͗111͘ axis, and depends on the composition ͑Ti content͒ and the dopant content. Along with the structural research, other physical properties at the F RL -F RH phase transition have also been investigated.…”

Section: Introductionmentioning

confidence: 68%

“…The experimental results for T*, T C , and ⌬TϭT*ϪT C , corresponding to different niobium contents, are presented in Table I along with the dependence on Ti content. This notation for the extrapolated Curie-Weiss temperature (T C ) and the transition temperature (T*уT C ) is the same as that used in our previously published work 21 but differs from that used by other authors, which is T 0 and T C , respectively, for the Curie temperature and the transition temperature.…”

Section: Methodsmentioning

confidence: 99%

Dielectric characterization of the phase transitions in Pb1−y/2(Zr1−xTix)1−yNbyO3(0.03⩽x⩽0.04, 0.02⩽y⩽0.05)

Duan¹,

Cereceda²,

Noheda³

et al. 1997

Journal of Applied Physics

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Thermodynamic Theory

Rossetti¹

2008

Piezoelectricity

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Composition dependence of the ferroelectric-paraelectric transition in the mixed systemPbZr1−x

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Cited by 32 publications

References 8 publications

Elastic and anelastic relaxation behaviour of perovskite multiferroics I: PbZr0.53Ti0.47O3 (PZT)–PbFe0.5Nb0.5O3 (PFN)

Elastic and anelastic relaxation behaviour of perovskite multiferroics I: PbZr0.53Ti0.47O3 (PZT)–PbFe0.5Nb0.5O3 (PFN)

Dielectric characterization of the phase transitions in Pb1−y/2(Zr1−xTix)1−yNbyO3(0.03⩽x⩽0.04, 0.02⩽y⩽0.05)

Thermodynamic Theory

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