Antiferrodistortive phase transition in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">P</mml:mi><mml:mi mathvariant="normal">b</mml:mi><mml:mo>(</mml:mo><mml:mi mathvariant="normal">T</mml:mi><mml:mi mathvariant="normal">i</mml:mi></mml:mrow><mml:mrow><mml:mn>0.48</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Zr</mml:mi></mml:mrow><mml:mrow><mml:mn>0.52</mml:mn></mml:m

Hatch, Dorian M.; Stokes, Harold T.; Ranjan, Rajeev; Ragini,; Mishra, S. K.; Pandey, Dhananjai; Kennedy, Brendan J.

doi:10.1103/physrevb.65.212101

Cited by 89 publications

(74 citation statements)

References 9 publications

(6 reference statements)

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“…This is in agreement with the observations of a low temperature superstructure phase Cc already described by Hatch et al 5 and Pandey and Ragini 6 since the superlattice reflections cannot be observed in these measurements. ͑II͒ In an intermediate range around room temperature a changeover of the dominating symmetry takes place, marking the transition between the growth of nanodomains to tetragonal microdomains.…”

Section: ͑I͒supporting

confidence: 82%

“…2͑f͔͒. This indicates a crystal structure change with composition to the antiferrodistortive low temperature phase reported as Cc 5,6 or R3c. 22 For undoped PZT, Pandey et al 11 reported this phase transition to occur at around 200 K.…”

Section: Temmentioning

confidence: 99%

“…Noheda et al 1 proposed an intermediate monoclinic phase with space group Cm ͑C s 3 ͒ as a bridging phase between the tetragonal and the rhombohedral regions. Additionally Hatch et al 5 and Pandey and Ragini 6 described the low temperature phase at the MPB with space group Cc ͑C 5 4 ͒ exhibiting octahedral tilting of the type a − a − c − . From first principle calculations Kornev et al 7 postulated a tetragonal low temperature phase with space group I4cm ͑C 4v 10 ͒ and octahedral tilting of the type a 0 a 0 c − .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of lanthanum doping on the morphotropic phase boundary of lead zirconate titanate

Hinterstein

Schoenau

Kling

et al. 2010

Journal of Applied Physics

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A phase diagram for morphotropic ͑Pb 0.985 La 0.01 ͒͑Zr 1−x Ti x ͒O 3 is proposed based on a combination of X-ray and neutron powder diffraction experiments and complemented by transmission electron microscopy. Dependent on composition three regions are characterized. The stability range of tetragonal microdomains for high Ti contents, the stability range of rhombohedral microdomains for low Ti contents, and an intermediate stability range of nanodomains. All three regions exhibit a corresponding low temperature configuration. Temperature dependent diffraction revealed that lanthanum doping reduces the sensitivity of the structure to changes in temperature and composition. A continuous transition from pseudorhombohedral to tetragonal symmetry with an intermediate two-phase region at the morphotropic phase boundary is observed. A similar transition of low temperature superstructure phases from pseudorhombohedral to pseudotetragonal with an intermediate monoclinic phase governed by a continuous change in the oxygen octahedral tilt system from a − a − a − over a − a − c − to a 0 a 0 c − is identified.

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Section: ͑I͒supporting

confidence: 82%

Section: Temmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of lanthanum doping on the morphotropic phase boundary of lead zirconate titanate

Hinterstein

Schoenau

Kling

et al. 2010

Journal of Applied Physics

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show abstract

“…La direction de la polarisation dans cette phase se situe entre les directions [001] Q et [111] R et cela pourrait expliquer la forte réponse piézoélectrique [4]. Très récemment, une seconde phase monoclinique stable à basse température (F M -groupe d'espace Cc) a été mise en évidence [5]. Cette phase est obtenue à partir de la phase F M (Cm) par rotation des octaèdres (Zr,Ti)O 6 avec, comme conséquence, le doublement de la maille.…”

Section: Les Solutions Solides Pbzr1-xtixo3 (Pzt) -L'état De L'artunclassified

Le paramètre pression : un outil pour l’optimisation des matériaux piézo-électriques

et al. 2004

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Résumé. Le paramètre pression modifie de façon très importante la structure cristalline des solides. Ce paramètre peut induire des variations structurales continues sans augmenter l'agitation thermique et présente donc des avantages par rapport aux paramètres température et composition. L'effet de la pression est de réduire le volume. Cela se fait par : diminution des distances interatomiques, variations angulaires, rotation de polyèdres, transitions structurales avec dans de nombreux cas une augmentation de la coordinence des cations et une modification de la nature des liaisons chimiques. Les propriétés physiques du matériau se modifient en fonction des variations de la structure cristalline. Ainsi, en reproduisant les conditions thermodynamiques auxquelles sont soumis, naturellement ou volontairement, les matériaux, le paramètre pression nous fournit un outil puissant pour la conception et l'optimisation des dispositifs où ils s'intègrent. Les solutions solides PbZr 1-x Ti x O 3 (PZT) sont à la base des matériaux piézo-céramiques les plus utilisés à l'heure actuelle. Leurs propriétés diélectriques et piézoélectriques sont très sensibles aux contraintes dues aux champs élastiques ou électriques. Il est donc important de connaître l'effet de la pression hydrostatique sur la nature et la stabilité des phases de ce système. Nos résultats, obtenus par diffraction des rayons X, diffraction neutronique, diffusion Raman et mesures diélectriques sous pression, montrent que la phase monoclinique F M HT , qui est à l'origine des propriétés piézoélectriques remarquables de la composition morphotropique (PbZr 0,52 Ti 0,48 O 3 ) à pression ambiante, peut également être obtenue à des pressions modérées dans la zone riche en PbTiO 3 du diagramme de phases. D'où la notion nouvelle « d'adaptabilité » de la solution solide introduite par la variable pression. Le diagramme de phases P-x obtenu à partir de ces résultats devrait nous permettre de mieux comprendre les effets des contraintes sur les propriétés de ces matériaux et par conséquent d'optimiser leur élaboration pour des applications sous fortes contraintes.

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“…As discussed above, this same transition may also occur along the PZ-PFN binary join and would give a stability field for the R3c structure extending into the ternary system at room temperature. In the stability field of the monoclinic structure below the MPB of PZT, the same octahedral tilting transition involves the symmetry change Cm-Cc [57][58][59][60][61][62], but no information is yet available to determine whether this occurs in the ternary system as well. In (Pb 0.94 Sr 0.06 )(Zr 0.55 Ti 0.…”

Section: Ternary Compositionsmentioning

confidence: 99%

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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Antiferrodistortive phase transition inPb(Ti0.48Zr0.52

Cited by 89 publications

References 9 publications

Influence of lanthanum doping on the morphotropic phase boundary of lead zirconate titanate

Influence of lanthanum doping on the morphotropic phase boundary of lead zirconate titanate

Le paramètre pression : un outil pour l’optimisation des matériaux piézo-électriques

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

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