Polymorphism in BaPb1-xBixO3 at the superconducting composition

E. Climent-Pascual; N. Ni; S. Jia; Q. Huang; R. J. Cava

doi:10.1103/PhysRevB.83.174512

Polymorphism in BaPb_1-xBi_xO₃ at the superconducting composition

E. Climent-Pascual, N. Ni, S. Jia, Q. Huang, R. J. Cava

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32 Scopus citations

Abstract

Using a combination of high-resolution and high-sensitivity neutron and x-ray diffraction measurements, it is shown that BaPb_1-xBi _xO₃ is dimorphic for the critical superconducting composition regime of x between 0.2 and 0.3. The system is not chemically phase separated; the simultaneous existence of tetragonal and orthorhombic polymorphs of the same composition is demonstrated. The polymorphs differ fundamentally in the distortion and tilting of the octahedra, such that they cannot be obtained from each other via a second-order phase transition. It is established that the tetragonal symmetry polymorph is the superconducting phase.

Original language	English (US)
Article number	174512
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	83
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.83.174512
State	Published - May 16 2011

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.83.174512

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abstract = "Using a combination of high-resolution and high-sensitivity neutron and x-ray diffraction measurements, it is shown that BaPb1-xBi xO3 is dimorphic for the critical superconducting composition regime of x between 0.2 and 0.3. The system is not chemically phase separated; the simultaneous existence of tetragonal and orthorhombic polymorphs of the same composition is demonstrated. The polymorphs differ fundamentally in the distortion and tilting of the octahedra, such that they cannot be obtained from each other via a second-order phase transition. It is established that the tetragonal symmetry polymorph is the superconducting phase.",

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AU - Climent-Pascual, E.

AU - Ni, N.

AU - Jia, S.

AU - Huang, Q.

AU - Cava, R. J.

PY - 2011/5/16

Y1 - 2011/5/16

N2 - Using a combination of high-resolution and high-sensitivity neutron and x-ray diffraction measurements, it is shown that BaPb1-xBi xO3 is dimorphic for the critical superconducting composition regime of x between 0.2 and 0.3. The system is not chemically phase separated; the simultaneous existence of tetragonal and orthorhombic polymorphs of the same composition is demonstrated. The polymorphs differ fundamentally in the distortion and tilting of the octahedra, such that they cannot be obtained from each other via a second-order phase transition. It is established that the tetragonal symmetry polymorph is the superconducting phase.

AB - Using a combination of high-resolution and high-sensitivity neutron and x-ray diffraction measurements, it is shown that BaPb1-xBi xO3 is dimorphic for the critical superconducting composition regime of x between 0.2 and 0.3. The system is not chemically phase separated; the simultaneous existence of tetragonal and orthorhombic polymorphs of the same composition is demonstrated. The polymorphs differ fundamentally in the distortion and tilting of the octahedra, such that they cannot be obtained from each other via a second-order phase transition. It is established that the tetragonal symmetry polymorph is the superconducting phase.

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Polymorphism in BaPb_1-xBi_xO₃ at the superconducting composition

Abstract

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