Microstructure and properties of YBa2Cu3O 9-δ superconductors with transitions at 90 and near 290 K

J. Narayan; V. N. Shukla; S. J. Lukasiewicz; N. Biunno; R. Singh; A. F. Schreiner; S. J. Pennycook

doi:10.1063/1.98808

Microstructure and properties of YBa₂Cu₃O _9-δ superconductors with transitions at 90 and near 290 K

J. Narayan, V. N. Shukla, S. J. Lukasiewicz, N. Biunno, R. Singh, A. F. Schreiner, S. J. Pennycook

North Carolina State University

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Abstract

We have investigated the microstructure and properties of YBa ₂Cu₃O_9-δ that contain resistive transitions at 90 and near 290 K using high-resolution and analytical transmission electron microscopy and Raman scattering techniques. The specimens contain normal orthorhombic (Pmmm space group) phase associated with T _c=90 K, and another phase which we tentatively assign it to be associated with the resistive transitions near 290 K. The new phase has a c axis larger by about 16% and it grows epitaxially on the {100} planes of the orthorhombic (tripled perovskite unit cell) phase having T_c=90 K.

Original language	English
Pages (from-to)	940-942
Number of pages	3
Journal	Applied Physics Letters
Volume	51
Issue number	12
DOIs	https://doi.org/10.1063/1.98808
State	Published - 1987
Externally published	Yes

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title = "Microstructure and properties of YBa2Cu3O 9-δ superconductors with transitions at 90 and near 290 K",

abstract = "We have investigated the microstructure and properties of YBa 2Cu3O9-δ that contain resistive transitions at 90 and near 290 K using high-resolution and analytical transmission electron microscopy and Raman scattering techniques. The specimens contain normal orthorhombic (Pmmm space group) phase associated with T c=90 K, and another phase which we tentatively assign it to be associated with the resistive transitions near 290 K. The new phase has a c axis larger by about 16% and it grows epitaxially on the {100} planes of the orthorhombic (tripled perovskite unit cell) phase having Tc=90 K.",

author = "J. Narayan and Shukla, {V. N.} and Lukasiewicz, {S. J.} and N. Biunno and R. Singh and Schreiner, {A. F.} and Pennycook, {S. J.}",

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AU - Narayan, J.

AU - Shukla, V. N.

AU - Lukasiewicz, S. J.

AU - Biunno, N.

AU - Singh, R.

AU - Schreiner, A. F.

AU - Pennycook, S. J.

PY - 1987

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AB - We have investigated the microstructure and properties of YBa 2Cu3O9-δ that contain resistive transitions at 90 and near 290 K using high-resolution and analytical transmission electron microscopy and Raman scattering techniques. The specimens contain normal orthorhombic (Pmmm space group) phase associated with T c=90 K, and another phase which we tentatively assign it to be associated with the resistive transitions near 290 K. The new phase has a c axis larger by about 16% and it grows epitaxially on the {100} planes of the orthorhombic (tripled perovskite unit cell) phase having Tc=90 K.

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Microstructure and properties of YBa₂Cu₃O _9-δ superconductors with transitions at 90 and near 290 K

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