A TEM and neutron diffraction study of the local structure in the rhombohedral phase of lead zirconate titanate

Ricote, J.; Corker, D. L.; Whatmore, R. W.; Impey, S. A.; Glazer, A. M.; Dec, J.; Roleder, Krystian

doi:10.1088/0953-8984/10/8/011

Cited by 81 publications

(89 citation statements)

References 14 publications

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“…Here electron, but not neutron or x-ray, diffraction experiments reveal superlattice peaks incompatible with the R structure, variously attributed to rotations of the O octahedra [7,8] or to antiferroelectric-like cation displacements away from the average 111 direction [9,10].…”

Section: Introductionmentioning

confidence: 83%

Octahedral tilting, monoclinic phase and the phase diagram of PZT

Cordero

Trequattrini

Craciun

et al. 2011

J. Phys.: Condens. Matter

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Abstract. Anelastic and dielectric spectroscopy measurements on PbZr 1−x Ti x O 3 (PZT) close to the morphotropic (MPB) and antiferroelectric boundaries provide new insight in some controversial aspects of its phase diagram. No evidence is found of a border separating monoclinic (M) from rhombohedral (R) phases, in agreement with recent structural studies supporting a coexistence of the two phases over a broad composition range x < 0.5, with the fraction of M increasing toward the MPB. It is also discussed why the observed maximum of elastic compliance appears to be due to a rotational instability of the polarisation and therefore cannot be explained by extrinsic softening from finely twinned R phase alone, but indicates the presence also of M phase, not necessarily homogeneous.A new diffuse transition is found within the ferroelectric phase near x ∼ 0.1, at a temperature T IT higher than the well established boundary T T to the phase with tilted octahedra. It is proposed that around T IT the octahedra start rotating in a disordered manner and finally become ordered below T T . In this interpretation, the onset temperature for octahedral tilting monotonically increases up to the antiferroelectric transition of PbZrO 3 , and the depression of T T (x) below x = 0.18 would be a consequence of the partial relieve of the mismatch between the cation radii with the initial stage of tilting below T IT .2

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Section: Introductionmentioning

confidence: 83%

Octahedral tilting, monoclinic phase and the phase diagram of PZT

Cordero

Trequattrini

Craciun

et al. 2011

J. Phys.: Condens. Matter

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“…There are two controversial explanations for the existence of the incommensurate phase observed in the experiment. Ricote et al [4] concluded that the appearance of the IC phase is due to the surface effect by two experiments using the powder neutron diffraction and a transmission electron microscope. On the other hand, Viehland et al [5] considered it a bulk effect by directly observing the high resolution image of a transmission electron microscope.…”

Section: Discussionmentioning

confidence: 99%

Infinitesimal incommensurate stripe phase in an axial next-nearest-neighbor Ising model in two dimensions

Shirahata

Nakamura

2001

Phys. Rev. B

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An axial next-nearest-neighbor Ising (ANNNI) model is studied by using the non-equilibrium relaxation method. We find that the incommensurate stripe phase between the ordered phase and the paramagnetic phase is negligibly narrow or may vanish in the thermodynamic limit. The phase transition is the second-order transition if approached from the ordered phase, and it is of the Kosterlitz-Thouless type if approached from the paramagnetic phase. Both transition temperatures coincide with each other within the numerical errors. The incommensurate phase which has been observed previously is a paramagnetic phase with a very long correlation length (typically ξ ≥ 500). We could resolve this phase by treating very large systems (∼ 6400 × 6400), which is first made possible by employing the present method.

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“…The structural origin for these superlattice reflections is still under debate. 2,[5][6][7]9,21 However, the present in situ TEM study provides valuable insight into the physics mechanism for the presence of these superlattice reflections. It is clear in Fig.…”

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confidence: 99%

In situ transmission electron microscopy study of the electric field-induced transformation of incommensurate modulations in a Sn-modified lead zirconate titanate ceramic

Tan

2004

Applied Physics Letters

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Electric field-induced transformation of incommensurate modulations in a Sn-modified lead zirconate titanate ceramic was investigated with an electric field in situ transmission electron microscopy technique. It is found that the spacing between the (1∕x){110} satellite spots and the fundamental reflections do not change with external electric field, indicating that the modulation wavelength stays constant under applied field. The intensity of these satellites starts to decrease when the field level reaches a critical value. Further increase in the field strength eventually leads to the complete disappearance of the satellite reflections. In addition, the 12{111}-type superlattice reflections showed no response to electrical stimuli.

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A TEM and neutron diffraction study of the local structure in the rhombohedral phase of lead zirconate titanate

Cited by 81 publications

References 14 publications

Octahedral tilting, monoclinic phase and the phase diagram of PZT

Octahedral tilting, monoclinic phase and the phase diagram of PZT

Infinitesimal incommensurate stripe phase in an axial next-nearest-neighbor Ising model in two dimensions

In situ transmission electron microscopy study of the electric field-induced transformation of incommensurate modulations in a Sn-modified lead zirconate titanate ceramic

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