Structural disorder and superconductivity suppression in NdBa2Cu3Oz (z ∼ 7)

V. V. Petrykin; E. A. Goodilin; J. Hester; E. A. Trofimenko; M. Kakihana; N. N. Oleynikov; Yu D. Tretyakov

doi:10.1016/S0921-4534(00)00368-3

Structural disorder and superconductivity suppression in NdBa₂Cu₃O_z (z ∼ 7)

V. V. Petrykin, E. A. Goodilin, J. Hester, E. A. Trofimenko, M. Kakihana, N. N. Oleynikov, Yu D. Tretyakov

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

Structural features of a low-T_c nearly stoichiometric Nd_1+xBa_2-xCu₃O_z phase (x ≤ 0.05, z ∼ 6.9, a = 3.897-3.899 Å, b = 3.902-3.908 Å, c = 11.707-11.719 Å) have been investigated for the first time by XRD, EXAFS structure refinement techniques and Raman spectroscopy. It has been found that the abnormal lattice parameters and the low superconductivity transition temperature (55 K) of such a phase are related to structural disorder in the Ba and Nd sites resulting in oxygen disordering which cannot be avoided by a standard oxidation procedure. It is shown that longer annealing at high temperatures is an important factor for reducing the oxygen disordering and hence enhancing superconducting properties after oxidation.

Original language	English
Pages (from-to)	16-32
Number of pages	17
Journal	Physica C: Superconductivity and its applications
Volume	340
Issue number	1
DOIs	https://doi.org/10.1016/S0921-4534(00)00368-3
Publication status	Published - 2000 Nov 15
Externally published	Yes

Keywords

EXAFS
NdBaCuO
Roman scattering spectroscopy
Structural disorder
Structure refinement
Superconductivity suppression

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4534(00)00368-3

Cite this

@article{2c344ceb79f446c785bee6302024f098,

title = "Structural disorder and superconductivity suppression in NdBa2Cu3Oz (z ∼ 7)",

abstract = "Structural features of a low-Tc nearly stoichiometric Nd1+xBa2-xCu3Oz phase (x ≤ 0.05, z ∼ 6.9, a = 3.897-3.899 {\AA}, b = 3.902-3.908 {\AA}, c = 11.707-11.719 {\AA}) have been investigated for the first time by XRD, EXAFS structure refinement techniques and Raman spectroscopy. It has been found that the abnormal lattice parameters and the low superconductivity transition temperature (55 K) of such a phase are related to structural disorder in the Ba and Nd sites resulting in oxygen disordering which cannot be avoided by a standard oxidation procedure. It is shown that longer annealing at high temperatures is an important factor for reducing the oxygen disordering and hence enhancing superconducting properties after oxidation.",

keywords = "EXAFS, NdBaCuO, Roman scattering spectroscopy, Structural disorder, Structure refinement, Superconductivity suppression",

author = "Petrykin, {V. V.} and Goodilin, {E. A.} and J. Hester and Trofimenko, {E. A.} and M. Kakihana and Oleynikov, {N. N.} and Tretyakov, {Yu D.}",

note = "Funding Information: This work was supported by the Grand-in-Aid for Scientific Research 11450246, RFBR (grant 98-03-32575, 96-15-97385), the Russian Universities Program (grant 98-06-5057) and the Program for Actual Problems of Physics of Condensed Matter (Superconductivity, grant 96079). Part of this work was performed at the Australian National Beamline Facility with support from the Australian Synchrotron Research Program, which is funded by the Commonwealth of Australia under the Major National Research Facilities program. Authors thank V.V. Lennikov (MSU) for measuring the magnetic properties of the experimental samples and G. Foran (ANSTO) for the valuable advice on EXAFS data reduction. ",

year = "2000",

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doi = "10.1016/S0921-4534(00)00368-3",

language = "English",

volume = "340",

pages = "16--32",

journal = "Physica C: Superconductivity and its Applications",

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TY - JOUR

T1 - Structural disorder and superconductivity suppression in NdBa2Cu3Oz (z ∼ 7)

AU - Petrykin, V. V.

AU - Goodilin, E. A.

AU - Hester, J.

AU - Trofimenko, E. A.

AU - Kakihana, M.

AU - Oleynikov, N. N.

AU - Tretyakov, Yu D.

N1 - Funding Information: This work was supported by the Grand-in-Aid for Scientific Research 11450246, RFBR (grant 98-03-32575, 96-15-97385), the Russian Universities Program (grant 98-06-5057) and the Program for Actual Problems of Physics of Condensed Matter (Superconductivity, grant 96079). Part of this work was performed at the Australian National Beamline Facility with support from the Australian Synchrotron Research Program, which is funded by the Commonwealth of Australia under the Major National Research Facilities program. Authors thank V.V. Lennikov (MSU) for measuring the magnetic properties of the experimental samples and G. Foran (ANSTO) for the valuable advice on EXAFS data reduction.

PY - 2000/11/15

Y1 - 2000/11/15

N2 - Structural features of a low-Tc nearly stoichiometric Nd1+xBa2-xCu3Oz phase (x ≤ 0.05, z ∼ 6.9, a = 3.897-3.899 Å, b = 3.902-3.908 Å, c = 11.707-11.719 Å) have been investigated for the first time by XRD, EXAFS structure refinement techniques and Raman spectroscopy. It has been found that the abnormal lattice parameters and the low superconductivity transition temperature (55 K) of such a phase are related to structural disorder in the Ba and Nd sites resulting in oxygen disordering which cannot be avoided by a standard oxidation procedure. It is shown that longer annealing at high temperatures is an important factor for reducing the oxygen disordering and hence enhancing superconducting properties after oxidation.

AB - Structural features of a low-Tc nearly stoichiometric Nd1+xBa2-xCu3Oz phase (x ≤ 0.05, z ∼ 6.9, a = 3.897-3.899 Å, b = 3.902-3.908 Å, c = 11.707-11.719 Å) have been investigated for the first time by XRD, EXAFS structure refinement techniques and Raman spectroscopy. It has been found that the abnormal lattice parameters and the low superconductivity transition temperature (55 K) of such a phase are related to structural disorder in the Ba and Nd sites resulting in oxygen disordering which cannot be avoided by a standard oxidation procedure. It is shown that longer annealing at high temperatures is an important factor for reducing the oxygen disordering and hence enhancing superconducting properties after oxidation.

KW - EXAFS

KW - NdBaCuO

KW - Roman scattering spectroscopy

KW - Structural disorder

KW - Structure refinement

KW - Superconductivity suppression

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