Structural investigation of La2SrDyCu2Oy complexities

Emetere, Moses and Sanni, Samuel Eshorame and Abodurina, J.T. and Okoro, Emeka Emmanuel and Atayero, A. A. and Akinsiku, A.A. (2019) Structural investigation of La2SrDyCu2Oy complexities. Materials Chemistry and Physics. pp. 482-488.

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Abstract

The structural complexities in lanthanum cuprates family were revisited with the aim of understanding factors that structurally triggers long-range repulsive Coulomb interactions. In this study, polycrystalline samples of La2SrDyCu2Oy (LSDCO) were prepared via solid-state synthesis using high purity chemicals. The X-ray diffraction experiment revealed an unusual structural anomaly in the [2 0 5] and [2 1 3] planes of the crystal lattice. The lattice system was further probed using the Niggli-reduced cell at gamma=6.0678. It was observed that grain boundaries leading to electron trapping originates from the CuO2 plane while the mesoscopic phase separation is controlled by the cell type and axial value in the x- and y-axes of the crystal lattice. Although the research partly supports popular findings that the main positive lobes of LSDCO are centered on the z-axis, it observed that the negative lobe is located in a ring-like structure along the XeY plane. This result is particularly interesting because it shows the likely origin of broken symmetry in LSDCO sample. The ion bombardment analysis shows that the LSDCO electron-phonon ratio was 8:5. The microstructural analysis of the LSDCO sample was observed to have magnetic field strength of 1.5 kA/m. LSDCO sample possess enormous structural mystery that may interest further studies beyond superconductivity.

Item Type:	Article
Uncontrolled Keywords:	Cuprates High temperature superconductor Lattice LSDCO Structural modulation
Subjects:	T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery T Technology > TP Chemical technology
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Mrs Patricia Nwokealisi
Date Deposited:	29 Mar 2019 14:53
Last Modified:	29 Mar 2019 14:53
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/12546

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