An enhancement of Tc, from 45 K to 70 K, via Cd substitution in (Pb, Cu)Sr2(Ca, Y)Cu2O7-δ

R. S. Liu; D. Groult; A. Maignan; S. F. Hu; D. A. Jefferson; B. Raveau; C. Michel; M. Hervieu; P. P. Edwards

doi:10.1016/0921-4534(92)90070-S

An enhancement of T_c, from 45 K to 70 K, via Cd substitution in (Pb, Cu)Sr₂(Ca, Y)Cu₂O_7-δ

R. S. Liu^*, D. Groult, A. Maignan, S. F. Hu, D. A. Jefferson, B. Raveau, C. Michel, M. Hervieu, P. P. Edwards

^*Corresponding author for this work

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

53 Citations (Scopus)

Abstract

An enhancement in the superconducting transition temperature, T_c, from 45 K to 70 K, has been discovered during the course of our investigation of Cd-doping of the Pb-based 1212 superconductors. Specifically, we have attempted to synthesize a material with nominal composition (Pb_0.5Cd_0.5)Sr₂(Ca_0.5Y_0.5)Cu₂O_7-δ, derived from the lead cuprate superconductor (Pb_0.7Cu_0.3)Sr₂(Ca_0.5Y_0.5)Cu₂O_7-δ. From X-ray and electron diffraction, coupled with energy-dispersive X-ray emission spectrometry, we can identify the phase responsible for the 70 K superconductivity to be (Pb_0.67(2)Cd_0.33(5))Sr_2.1(1)(Cd_0.20(3)Ca_0.33(3)Y_0.48(4))Cu₂O_7-δ. Thus, we propose substitution of Cd both for Cu, in the rock salt-type (Pb, Cu)O layers, and Ca, in the Ca_0.5Y_0.5 lattice sites. No superlattice spots or streaks were observed in the electron diffraction experiments along the a^*, b^* and c^* directions in the Cd-substituted material.

Original language	English
Pages (from-to)	35-40
Number of pages	6
Journal	Physica C: Superconductivity and its applications
Volume	195
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(92)90070-S
Publication status	Published - 1992 May 20
Externally published	Yes

ASJC Scopus subject areas

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

Access to Document

10.1016/0921-4534(92)90070-S

Cite this

@article{237d43d872714a5db1d6b3a5606d7f6d,

title = "An enhancement of Tc, from 45 K to 70 K, via Cd substitution in (Pb, Cu)Sr2(Ca, Y)Cu2O7-δ",

abstract = "An enhancement in the superconducting transition temperature, Tc, from 45 K to 70 K, has been discovered during the course of our investigation of Cd-doping of the Pb-based 1212 superconductors. Specifically, we have attempted to synthesize a material with nominal composition (Pb0.5Cd0.5)Sr2(Ca0.5Y0.5)Cu2O7-δ, derived from the lead cuprate superconductor (Pb0.7Cu0.3)Sr2(Ca0.5Y0.5)Cu2O7-δ. From X-ray and electron diffraction, coupled with energy-dispersive X-ray emission spectrometry, we can identify the phase responsible for the 70 K superconductivity to be (Pb0.67(2)Cd0.33(5))Sr2.1(1)(Cd0.20(3)Ca0.33(3)Y0.48(4))Cu2O7-δ. Thus, we propose substitution of Cd both for Cu, in the rock salt-type (Pb, Cu)O layers, and Ca, in the Ca0.5Y0.5 lattice sites. No superlattice spots or streaks were observed in the electron diffraction experiments along the a*, b* and c* directions in the Cd-substituted material.",

author = "Liu, {R. S.} and D. Groult and A. Maignan and Hu, {S. F.} and Jefferson, {D. A.} and B. Raveau and C. Michel and M. Hervieu and Edwards, {P. P.}",

note = "Funding Information: We thank the BICC plc., the Fellowship of Engineering,B P, JEOL (UK) and SERC for support. One of us (SFH) thanks the financial support from the",

year = "1992",

month = may,

day = "20",

doi = "10.1016/0921-4534(92)90070-S",

language = "English",

volume = "195",

pages = "35--40",

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

issn = "0921-4534",

publisher = "Elsevier",

number = "1-2",

}

TY - JOUR

T1 - An enhancement of Tc, from 45 K to 70 K, via Cd substitution in (Pb, Cu)Sr2(Ca, Y)Cu2O7-δ

AU - Liu, R. S.

AU - Groult, D.

AU - Maignan, A.

AU - Hu, S. F.

AU - Jefferson, D. A.

AU - Raveau, B.

AU - Michel, C.

AU - Hervieu, M.

AU - Edwards, P. P.

N1 - Funding Information: We thank the BICC plc., the Fellowship of Engineering,B P, JEOL (UK) and SERC for support. One of us (SFH) thanks the financial support from the

PY - 1992/5/20

Y1 - 1992/5/20

N2 - An enhancement in the superconducting transition temperature, Tc, from 45 K to 70 K, has been discovered during the course of our investigation of Cd-doping of the Pb-based 1212 superconductors. Specifically, we have attempted to synthesize a material with nominal composition (Pb0.5Cd0.5)Sr2(Ca0.5Y0.5)Cu2O7-δ, derived from the lead cuprate superconductor (Pb0.7Cu0.3)Sr2(Ca0.5Y0.5)Cu2O7-δ. From X-ray and electron diffraction, coupled with energy-dispersive X-ray emission spectrometry, we can identify the phase responsible for the 70 K superconductivity to be (Pb0.67(2)Cd0.33(5))Sr2.1(1)(Cd0.20(3)Ca0.33(3)Y0.48(4))Cu2O7-δ. Thus, we propose substitution of Cd both for Cu, in the rock salt-type (Pb, Cu)O layers, and Ca, in the Ca0.5Y0.5 lattice sites. No superlattice spots or streaks were observed in the electron diffraction experiments along the a*, b* and c* directions in the Cd-substituted material.

AB - An enhancement in the superconducting transition temperature, Tc, from 45 K to 70 K, has been discovered during the course of our investigation of Cd-doping of the Pb-based 1212 superconductors. Specifically, we have attempted to synthesize a material with nominal composition (Pb0.5Cd0.5)Sr2(Ca0.5Y0.5)Cu2O7-δ, derived from the lead cuprate superconductor (Pb0.7Cu0.3)Sr2(Ca0.5Y0.5)Cu2O7-δ. From X-ray and electron diffraction, coupled with energy-dispersive X-ray emission spectrometry, we can identify the phase responsible for the 70 K superconductivity to be (Pb0.67(2)Cd0.33(5))Sr2.1(1)(Cd0.20(3)Ca0.33(3)Y0.48(4))Cu2O7-δ. Thus, we propose substitution of Cd both for Cu, in the rock salt-type (Pb, Cu)O layers, and Ca, in the Ca0.5Y0.5 lattice sites. No superlattice spots or streaks were observed in the electron diffraction experiments along the a*, b* and c* directions in the Cd-substituted material.

UR - http://www.scopus.com/inward/record.url?scp=0026857002&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026857002&partnerID=8YFLogxK

U2 - 10.1016/0921-4534(92)90070-S

DO - 10.1016/0921-4534(92)90070-S

M3 - Article

AN - SCOPUS:0026857002

SN - 0921-4534

VL - 195

SP - 35

EP - 40

JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

IS - 1-2

ER -

An enhancement of T_c, from 45 K to 70 K, via Cd substitution in (Pb, Cu)Sr₂(Ca, Y)Cu₂O_7-δ

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this