Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102120
Title: Relationship Between Electronic and Crystal Structure in Nd1 + xBa2 − xCu3O6 + δ
Authors: Fetisov, A. V.
Estemirova, S. K.
Issue Date: 2018
Publisher: Springer New York LLC
Citation: Fetisov A. V. Relationship Between Electronic and Crystal Structure in Nd1 + xBa2 − xCu3O6 + δ / A. V. Fetisov, S. K. Estemirova. — DOI 10.1007/s10948-017-4188-0 // Journal of Superconductivity and Novel Magnetism. — 2018. — Vol. 31. — Iss. 1. — P. 203-208.
Abstract: In accordance with a relation between the lattice parameter c and the concentration of holes p, which has been found earlier for the YBa2Cu3O6+δcompound, we obtain the p parameter in the same manner for the solid solution Nd1.2Ba1.8Cu3O6+δwith substitution of Nd3+for Ba2+in barium sites. For this, structural and superconducting properties of the Nd1.2Ba1.8Cu3O6+δsamples stored for specified times τ after quenching from annealing temperatures have been studied. The investigation shows that Nd1.2Ba1.8Cu3O6+δstored for a long time has quite a low critical temperature Tcextending only to Tconset = 55 K for the most oxidized sample with δ = 0.953. We find that the δ-dependence of the lattice parameter c significantly changes with time τ. When using the relation between c and p, the existence of electron doping of 0.045 per Cu in Nd1.2Ba1.8Cu3O6+δcan be inferred. This doping explains well-reduced Tcin Nd1.2Ba1.8Cu3O6+δ. In addition, we observe a local drop of Tcby up to 20 K for the samples with p˜0.095 (δ˜0.8) similar to decreasing Tcknown as “anomaly 1/8”. © 2017, Springer Science+Business Media New York.
Keywords: MAGNETIC PROPERTIES
PEROVSKITES
SUPERCONDUCTIVITY
X-RAY METHODS
BARIUM COMPOUNDS
CRYSTAL STRUCTURE
LATTICE CONSTANTS
MAGNETIC PROPERTIES
PEROVSKITE
SUPERCONDUCTIVITY
ANNEALING TEMPERATURES
BARIUM SITES
CRITICAL TEMPERATURES
ELECTRON-DOPING
STRUCTURAL AND SUPERCONDUCTING PROPERTIES
X RAY METHODS
COPPER COMPOUNDS
URI: http://hdl.handle.net/10995/102120
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85020285309
PURE ID: 6253142
53f24561-e56e-45d3-bd54-3e6a81a589d2
ISSN: 15571939
DOI: 10.1007/s10948-017-4188-0
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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