The crystal structure of the prototypic ceramic superconductor BaPbO3: An X-ray and neutron diffraction study

Ritter, H.; Ihringer, J.; Maichle, J. K.; Prandl, W.; Hoser, A.; Hewat, A.W.

doi:10.1007/bf01321817

Cited by 29 publications

(16 citation statements)

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“…In agreement with the earlier observations of highresolution X-ray diffraction [6], our high-resolution backscattering data of BaPbO 3 showed indeed that the FWHM's of the (hh0)-type reflections are larger than those of the (00l)-type reflections. An example is illustrated in Fig.…”

Section: Resultssupporting

confidence: 91%

“…Except the direct evidence of monoclinic distortion in BaPbO 3 as was revealed by high resolution X-ray diffraction work of Ritter et al [6], conclusions made thus far on the symmetry of BaPbO 3 were conducted from Rietveld refinement of neutron powder diffraction data with low-or medium high resolution. Although Moussa et al presented a portion of their synchrotron X-ray diffraction data illustrating the broadening of some reflections of BaPbO 3 between room temperature and 15 K, the region does not contain the specific reflections that exclude the possibility of monoclinic distortion at room temperature [10].…”

Section: Introductionmentioning

confidence: 98%

“…Cox et al [4] and Thornton et al [5] showed, by neutron powder diffraction, that the structure of BaPbO 3 both at room temperature and at 4.2 K is orthorhombic with the space group Imma. Ritter et al [6], using high-resolution X-ray powder diffractometry (Guinier method) in combination with neutron powder diffraction measurements, found that the symmetry of BaPbO 3 is actually lower, and reported the monoclinic space group I2/m for it. The same space group has also been used by Marx et al to refine their neutron powder diffraction data [7].…”

Section: Introductionmentioning

confidence: 98%

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High-resolution neutron powder diffraction study on the structure of BaPbO3

Fu¹,

Visser²,

IJdo³

2005

Solid State Communications

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

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High-resolution neutron powder diffraction study on the structure of BaPbO3

Fu¹,

Visser²,

IJdo³

2005

Solid State Communications

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“…The coordination geometry of lead is similar to the one in BaPbO3, though more regular in the layered compound. At room temperature, there are three pairs of Pb--O bonds with lengths equal to 2.1444(6), 2.152(1) and 2.157(1)A in BaPbO3 (Ritter, Ihringer, Maichle, Prandl, Hoser & Hewat, 1989). In Ba2PbO4, we find two Pb---O bonds equal to 2.145 (2) and four equal to 2.1512 ~.…”

Section: =mentioning

confidence: 72%

“…However, the PbO6 octahedra in the layered compound (Fig. 2) are not tilted unlike those in the three-dimensional perovskite, BaPbO3 (Ritter, Ihringer, Maichle, Prandl, Hoser & Hewat, 1989). This reflects the rigidity of the intervening rock salt (Ba202) layers in the 2D perovskite.…”

Section: =mentioning

confidence: 95%

Time-of-flight powder neutron diffraction study of the structure of Ba2PbO4

Rosseinsky¹,

Prassides²

1991

Acta Crystallogr C

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Our results confirm the room-temperature structure determined earlier by X-ray work and show the lack of structural distortions down to 5 K. They also permit a very precise determination of the geometry of the PbO6 octahedra, showing that the tetragonal distortion had been overestimated before by at least a factor of 10. The implication of this result for recent band-structure calculations is stressed.

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Thin‐Film Ferroelectrics

et al. 2022

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non-centrosymmetric structures which can possess a spontaneous electric polarization which can be controlled using applied electric fields (Figure 1). Ferroelectrics themselves are inherently hierarchical materials-wherein picometer ionic displacements give rise to polarization which can collectively extend over millimeters or self-organize into complex mesoscopic structures or collectively reorient under applied stimuli (e.g., electric fields, temperature, or stress). Understanding these complex behaviors necessitates a multilevel approach, wherein atomistic, microscopic, mesoscopic, and macroscopic properties are studied in concert. Parallel advances in synthesis, characterization, and simulation have enabled such multimodal studies and provided a methodology through which a multitude of ferroelectric functionalities can now be achieved and studied.The promise of utilizing these functionalities in a number of applications kick-started the modern era of ferroelectric research in the mid-20th century. [1] Looking further back, in the 1920s, the ability to switch the polarization of sodium potassium tartrate tetrahydrate (commonly known as Rochelle salt) was first observed, along with dielectric and piezoelectric anomalies near the ferroelectric transition-now called the Curie point. In the 1940s, as part of the accelerated research push associated with World War II, ferroelectric BaTiO 3 was discovered by accident. When modifying TiO 2 with BaO to enhance its dielectric properties, a record-high dielectric permittivity was discovered and subsequent studies demonstrated a hysteretic switchable polarization. This discovery ushered in a new understanding of ferroelectricity as more than a rare phenomenon associated with salts that contained hydrogen bonding, but rather as a phenomenon that could exist in simple oxides like perovskites. Over the subsequent decades, the number of ferroelectric compositions exploded, particularly within the perovskite oxides, introducing new chemistries including LiNbO 3 and the PbZr x Ti 1−x O 3 system. Meanwhile, theoretical descriptions of ferroelectricity were advanced through lattice-dynamical models invoking a soft-mode optical phonon. Studies of the piezoelectric, thermodynamic, and optical properties in ferroelectric ceramics allowed for their deployment in a number of applications including piezoelectric sensors and pyroelectric infrared detectors. By the 1960s, increased interest in using ferroelectric polarization for nonvolatile memory was driving research into Over the last 30 years, the study of ferroelectric oxides has been revolutionized by the implementation of epitaxial-thin-film-based studies, which have driven many advances in the understanding of ferroelectric physics and the realization of novel polar structures and functionalities. New questions have motivated the development of advanced synthesis, characterization, and simulations of epitaxial thin films and, in turn, have provided new insights and applications across the micro-, meso-, and macroscopic length sc...

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The crystal structure of the prototypic ceramic superconductor BaPbO3: An X-ray and neutron diffraction study

Cited by 29 publications

References 15 publications

High-resolution neutron powder diffraction study on the structure of BaPbO3

High-resolution neutron powder diffraction study on the structure of BaPbO3

Time-of-flight powder neutron diffraction study of the structure of Ba2PbO4

Thin‐Film Ferroelectrics

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