Electron microscopy of a Gd-Ba-Cu-O superconductor

R. Ramesh; G. Thomas; R. L. Meng; P. H. Hor; C. W. Chu

doi:10.1557/JMR.1989.0515

Electron microscopy of a Gd-Ba-Cu-O superconductor

R. Ramesh, G. Thomas, R. L. Meng, P. H. Hor, C. W. Chu

Executive Vice President

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

1 Citation (Scopus)

Abstract

An electron microscopy study has been carried out to characterize the microstructure of a sintered Gd-Ba-Cu-O superconductor alloy. The GdBa₂Cu₃O_7-x phase in the oxygen annealed sample is orthorhombic while in the vacuum annealed sample it is tetragonal. It is shown that the details of the fine structure in the [001] zone axis convergent beam patterns can be used to distinguish between the orthorhombic form and the tetragonal form. In addition to this matrix phase, an amorphous phase is frequently observed at the triple grain junctions. Gd-rich inclusions have been observed inside the matrix phase.

Original language	English
Pages (from-to)	515-520
Number of pages	6
Journal	Journal of Materials Research
Volume	4
Issue number	3
DOIs	https://doi.org/10.1557/JMR.1989.0515
Publication status	Published - 1989 Jun

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1557/JMR.1989.0515

Cite this

@article{2253536ecb8142db8b1a066fa86117be,

title = "Electron microscopy of a Gd-Ba-Cu-O superconductor",

abstract = "An electron microscopy study has been carried out to characterize the microstructure of a sintered Gd-Ba-Cu-O superconductor alloy. The GdBa2Cu3O7-x phase in the oxygen annealed sample is orthorhombic while in the vacuum annealed sample it is tetragonal. It is shown that the details of the fine structure in the [001] zone axis convergent beam patterns can be used to distinguish between the orthorhombic form and the tetragonal form. In addition to this matrix phase, an amorphous phase is frequently observed at the triple grain junctions. Gd-rich inclusions have been observed inside the matrix phase.",

author = "R. Ramesh and G. Thomas and Meng, {R. L.} and Hor, {P. H.} and Chu, {C. W.}",

note = "Funding Information: The authors wish to acknowledge useful discussions with Dr. H. Zandbergen of the National Center for Electron Microscopy. The technical assistance of Mr. J. Turner is also gratefully acknowledged. This work was supported by the Director, Office of Energy Research, Office of Basic Energy Sciences, Materials Sciences Division of the United States Department of Energy under contract No. DE-AC03-76F00098. At Houston, the work is supported by NSF, NASA, Texas Center for Superconductivity at the University of Houston and the T.L.L. Temple Foundation.",

year = "1989",

month = jun,

doi = "10.1557/JMR.1989.0515",

language = "English",

volume = "4",

pages = "515--520",

journal = "Journal of Materials Research",

issn = "0884-2914",

publisher = "Materials Research Society",

number = "3",

}

TY - JOUR

T1 - Electron microscopy of a Gd-Ba-Cu-O superconductor

AU - Ramesh, R.

AU - Thomas, G.

AU - Meng, R. L.

AU - Hor, P. H.

AU - Chu, C. W.

N1 - Funding Information: The authors wish to acknowledge useful discussions with Dr. H. Zandbergen of the National Center for Electron Microscopy. The technical assistance of Mr. J. Turner is also gratefully acknowledged. This work was supported by the Director, Office of Energy Research, Office of Basic Energy Sciences, Materials Sciences Division of the United States Department of Energy under contract No. DE-AC03-76F00098. At Houston, the work is supported by NSF, NASA, Texas Center for Superconductivity at the University of Houston and the T.L.L. Temple Foundation.

PY - 1989/6

Y1 - 1989/6

N2 - An electron microscopy study has been carried out to characterize the microstructure of a sintered Gd-Ba-Cu-O superconductor alloy. The GdBa2Cu3O7-x phase in the oxygen annealed sample is orthorhombic while in the vacuum annealed sample it is tetragonal. It is shown that the details of the fine structure in the [001] zone axis convergent beam patterns can be used to distinguish between the orthorhombic form and the tetragonal form. In addition to this matrix phase, an amorphous phase is frequently observed at the triple grain junctions. Gd-rich inclusions have been observed inside the matrix phase.

AB - An electron microscopy study has been carried out to characterize the microstructure of a sintered Gd-Ba-Cu-O superconductor alloy. The GdBa2Cu3O7-x phase in the oxygen annealed sample is orthorhombic while in the vacuum annealed sample it is tetragonal. It is shown that the details of the fine structure in the [001] zone axis convergent beam patterns can be used to distinguish between the orthorhombic form and the tetragonal form. In addition to this matrix phase, an amorphous phase is frequently observed at the triple grain junctions. Gd-rich inclusions have been observed inside the matrix phase.

UR - http://www.scopus.com/inward/record.url?scp=0024656767&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024656767&partnerID=8YFLogxK

U2 - 10.1557/JMR.1989.0515

DO - 10.1557/JMR.1989.0515

M3 - Article

AN - SCOPUS:0024656767

SN - 0884-2914

VL - 4

SP - 515

EP - 520

JO - Journal of Materials Research

JF - Journal of Materials Research

IS - 3

ER -

Electron microscopy of a Gd-Ba-Cu-O superconductor

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this