Superconductivity in lanthanum barium cuprate perovskites

S. A. Sunshine, Lynn Schneemeyer, J. V. Waszczak, D. W. Murphy, S. Miraglia, A. Santoro, F. Beech

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Samples in the system Ba2-xLa1+xCu3O7-δ (0.0 ≤ x ≤ 0.5; 0 < δ < 0.25) have been prepared and characterized by X-ray powder diffraction, magnetic susceptibility, electrical resistivity, and for x = 0.5 powder neutron diffraction. This neutron diffraction study on Ba1.5La1.5Cu3O7.25 indicates that the structure is similar to the 92 K superconductor Ba2YCu3O7 with two exceptions. First, the "Ba site" contains 75% Ba and 25% La and second, the symmetry is tetragonal. At x = 0.5 the material is a semiconductor, but as x decreases metallic behavior and superconductivity are observed. Compositions with x < 0.2 contain traces of BaCuO2, but exhibit Tonsetc ≈ 90 K and R = 0 near 80 K. For x = 0.2-0.3, Tonsetc ≈ 60 K and R = 0 near 50 K are observed . For x ≤ 0.1 orthorhombic symmetry is observed. These results provide further evidence that oxygen stoichiometry and details of the oxygen ordering are important to superconductivity.

Original languageEnglish
Pages (from-to)632-638
Number of pages7
JournalJournal of Crystal Growth
Volume85
Issue number4
DOIs
StatePublished - 1 Jan 1987

Fingerprint

Lanthanum
Barium
perovskites
Superconductivity
lanthanum
cuprates
barium
neutron diffraction
superconductivity
Oxygen
Neutron powder diffraction
symmetry
oxygen
Neutron diffraction
Magnetic susceptibility
Stoichiometry
X ray powder diffraction
Superconducting materials
stoichiometry
Semiconductor materials

Cite this

Sunshine, S. A., Schneemeyer, L., Waszczak, J. V., Murphy, D. W., Miraglia, S., Santoro, A., & Beech, F. (1987). Superconductivity in lanthanum barium cuprate perovskites. Journal of Crystal Growth, 85(4), 632-638. https://doi.org/10.1016/0022-0248(87)90036-4
Sunshine, S. A. ; Schneemeyer, Lynn ; Waszczak, J. V. ; Murphy, D. W. ; Miraglia, S. ; Santoro, A. ; Beech, F. / Superconductivity in lanthanum barium cuprate perovskites. In: Journal of Crystal Growth. 1987 ; Vol. 85, No. 4. pp. 632-638.
@article{30a9db03a8dd4dcea5b0a941def45c58,
title = "Superconductivity in lanthanum barium cuprate perovskites",
abstract = "Samples in the system Ba2-xLa1+xCu3O7-δ (0.0 ≤ x ≤ 0.5; 0 < δ < 0.25) have been prepared and characterized by X-ray powder diffraction, magnetic susceptibility, electrical resistivity, and for x = 0.5 powder neutron diffraction. This neutron diffraction study on Ba1.5La1.5Cu3O7.25 indicates that the structure is similar to the 92 K superconductor Ba2YCu3O7 with two exceptions. First, the {"}Ba site{"} contains 75{\%} Ba and 25{\%} La and second, the symmetry is tetragonal. At x = 0.5 the material is a semiconductor, but as x decreases metallic behavior and superconductivity are observed. Compositions with x < 0.2 contain traces of BaCuO2, but exhibit Tonsetc ≈ 90 K and R = 0 near 80 K. For x = 0.2-0.3, Tonsetc ≈ 60 K and R = 0 near 50 K are observed . For x ≤ 0.1 orthorhombic symmetry is observed. These results provide further evidence that oxygen stoichiometry and details of the oxygen ordering are important to superconductivity.",
author = "Sunshine, {S. A.} and Lynn Schneemeyer and Waszczak, {J. V.} and Murphy, {D. W.} and S. Miraglia and A. Santoro and F. Beech",
year = "1987",
month = "1",
day = "1",
doi = "10.1016/0022-0248(87)90036-4",
language = "English",
volume = "85",
pages = "632--638",
journal = "Journal of Crystal Growth",
issn = "0022-0248",
publisher = "Elsevier",
number = "4",

}

Sunshine, SA, Schneemeyer, L, Waszczak, JV, Murphy, DW, Miraglia, S, Santoro, A & Beech, F 1987, 'Superconductivity in lanthanum barium cuprate perovskites', Journal of Crystal Growth, vol. 85, no. 4, pp. 632-638. https://doi.org/10.1016/0022-0248(87)90036-4

Superconductivity in lanthanum barium cuprate perovskites. / Sunshine, S. A.; Schneemeyer, Lynn; Waszczak, J. V.; Murphy, D. W.; Miraglia, S.; Santoro, A.; Beech, F.

In: Journal of Crystal Growth, Vol. 85, No. 4, 01.01.1987, p. 632-638.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Superconductivity in lanthanum barium cuprate perovskites

AU - Sunshine, S. A.

AU - Schneemeyer, Lynn

AU - Waszczak, J. V.

AU - Murphy, D. W.

AU - Miraglia, S.

AU - Santoro, A.

AU - Beech, F.

PY - 1987/1/1

Y1 - 1987/1/1

N2 - Samples in the system Ba2-xLa1+xCu3O7-δ (0.0 ≤ x ≤ 0.5; 0 < δ < 0.25) have been prepared and characterized by X-ray powder diffraction, magnetic susceptibility, electrical resistivity, and for x = 0.5 powder neutron diffraction. This neutron diffraction study on Ba1.5La1.5Cu3O7.25 indicates that the structure is similar to the 92 K superconductor Ba2YCu3O7 with two exceptions. First, the "Ba site" contains 75% Ba and 25% La and second, the symmetry is tetragonal. At x = 0.5 the material is a semiconductor, but as x decreases metallic behavior and superconductivity are observed. Compositions with x < 0.2 contain traces of BaCuO2, but exhibit Tonsetc ≈ 90 K and R = 0 near 80 K. For x = 0.2-0.3, Tonsetc ≈ 60 K and R = 0 near 50 K are observed . For x ≤ 0.1 orthorhombic symmetry is observed. These results provide further evidence that oxygen stoichiometry and details of the oxygen ordering are important to superconductivity.

AB - Samples in the system Ba2-xLa1+xCu3O7-δ (0.0 ≤ x ≤ 0.5; 0 < δ < 0.25) have been prepared and characterized by X-ray powder diffraction, magnetic susceptibility, electrical resistivity, and for x = 0.5 powder neutron diffraction. This neutron diffraction study on Ba1.5La1.5Cu3O7.25 indicates that the structure is similar to the 92 K superconductor Ba2YCu3O7 with two exceptions. First, the "Ba site" contains 75% Ba and 25% La and second, the symmetry is tetragonal. At x = 0.5 the material is a semiconductor, but as x decreases metallic behavior and superconductivity are observed. Compositions with x < 0.2 contain traces of BaCuO2, but exhibit Tonsetc ≈ 90 K and R = 0 near 80 K. For x = 0.2-0.3, Tonsetc ≈ 60 K and R = 0 near 50 K are observed . For x ≤ 0.1 orthorhombic symmetry is observed. These results provide further evidence that oxygen stoichiometry and details of the oxygen ordering are important to superconductivity.

UR - http://www.scopus.com/inward/record.url?scp=0023535505&partnerID=8YFLogxK

U2 - 10.1016/0022-0248(87)90036-4

DO - 10.1016/0022-0248(87)90036-4

M3 - Article

AN - SCOPUS:0023535505

VL - 85

SP - 632

EP - 638

JO - Journal of Crystal Growth

JF - Journal of Crystal Growth

SN - 0022-0248

IS - 4

ER -

Sunshine SA, Schneemeyer L, Waszczak JV, Murphy DW, Miraglia S, Santoro A et al. Superconductivity in lanthanum barium cuprate perovskites. Journal of Crystal Growth. 1987 Jan 1;85(4):632-638. https://doi.org/10.1016/0022-0248(87)90036-4