Electron diffraction comparative study of the tetragonal phases in YBa2Cu3Ox compounds

A. Brokman; M. Weger; F. W. Schapink; C. D. de Haan

doi:10.1016/0038-1098(88)90436-X

Electron diffraction comparative study of the tetragonal phases in YBa₂Cu₃O_x compounds

A. Brokman^*, M. Weger, F. W. Schapink, C. D. de Haan

^*Corresponding author for this work

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

3 Scopus citations

Abstract

The difference in the lattice parameter between the non-superconducting tetragonal phases of YBa₂Cu₃O_6.9 and YBa₂Cu₃O_6.2 is accompanied by two observed modes of structural differences; (a) The T2 exhibits a 2X 2 supercell distortion evidenced by weak extra diffraction spots which are not observed in the T1 phase diffraction pattern; and (b) The 001 convergent beam diffraction of T2 exhibits a fine dynamic structure which is not seen in the T1 phase. The superlattice is explained by a possible Jahn-Teller periodic distortion of the CuO₄ units and the vanishing of the dynamic extinction can be attributed to the dynamic fluctuation of the oxygen atom in the (003) planes. The two phenomena are explained in terms of the lattice contraction and are possibly coupled.

Original language	English
Pages (from-to)	473-475
Number of pages	3
Journal	Solid State Communications
Volume	65
Issue number	6
DOIs	https://doi.org/10.1016/0038-1098(88)90436-X
State	Published - Feb 1988

Access to Document

10.1016/0038-1098(88)90436-X

Cite this

@article{64b2b9bd0fc14b97b19b6266f30089f2,

title = "Electron diffraction comparative study of the tetragonal phases in YBa2Cu3Ox compounds",

abstract = "The difference in the lattice parameter between the non-superconducting tetragonal phases of YBa2Cu3O6.9 and YBa2Cu3O6.2 is accompanied by two observed modes of structural differences; (a) The T2 exhibits a 2X 2 supercell distortion evidenced by weak extra diffraction spots which are not observed in the T1 phase diffraction pattern; and (b) The 001 convergent beam diffraction of T2 exhibits a fine dynamic structure which is not seen in the T1 phase. The superlattice is explained by a possible Jahn-Teller periodic distortion of the CuO4 units and the vanishing of the dynamic extinction can be attributed to the dynamic fluctuation of the oxygen atom in the (003) planes. The two phenomena are explained in terms of the lattice contraction and are possibly coupled.",

author = "A. Brokman and M. Weger and Schapink, {F. W.} and {de Haan}, {C. D.}",

year = "1988",

month = feb,

doi = "10.1016/0038-1098(88)90436-X",

language = "אנגלית",

volume = "65",

pages = "473--475",

journal = "Solid State Communications",

issn = "0038-1098",

publisher = "Elsevier Ltd.",

number = "6",

}

TY - JOUR

T1 - Electron diffraction comparative study of the tetragonal phases in YBa2Cu3Ox compounds

AU - Brokman, A.

AU - Weger, M.

AU - Schapink, F. W.

AU - de Haan, C. D.

PY - 1988/2

Y1 - 1988/2

N2 - The difference in the lattice parameter between the non-superconducting tetragonal phases of YBa2Cu3O6.9 and YBa2Cu3O6.2 is accompanied by two observed modes of structural differences; (a) The T2 exhibits a 2X 2 supercell distortion evidenced by weak extra diffraction spots which are not observed in the T1 phase diffraction pattern; and (b) The 001 convergent beam diffraction of T2 exhibits a fine dynamic structure which is not seen in the T1 phase. The superlattice is explained by a possible Jahn-Teller periodic distortion of the CuO4 units and the vanishing of the dynamic extinction can be attributed to the dynamic fluctuation of the oxygen atom in the (003) planes. The two phenomena are explained in terms of the lattice contraction and are possibly coupled.

AB - The difference in the lattice parameter between the non-superconducting tetragonal phases of YBa2Cu3O6.9 and YBa2Cu3O6.2 is accompanied by two observed modes of structural differences; (a) The T2 exhibits a 2X 2 supercell distortion evidenced by weak extra diffraction spots which are not observed in the T1 phase diffraction pattern; and (b) The 001 convergent beam diffraction of T2 exhibits a fine dynamic structure which is not seen in the T1 phase. The superlattice is explained by a possible Jahn-Teller periodic distortion of the CuO4 units and the vanishing of the dynamic extinction can be attributed to the dynamic fluctuation of the oxygen atom in the (003) planes. The two phenomena are explained in terms of the lattice contraction and are possibly coupled.

UR - http://www.scopus.com/inward/record.url?scp=0023965632&partnerID=8YFLogxK

U2 - 10.1016/0038-1098(88)90436-X

DO - 10.1016/0038-1098(88)90436-X

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:0023965632

SN - 0038-1098

VL - 65

SP - 473

EP - 475

JO - Solid State Communications

JF - Solid State Communications

IS - 6

ER -

Electron diffraction comparative study of the tetragonal phases in YBa₂Cu₃O_x compounds

Abstract

Access to Document

Other files and links

Fingerprint

Cite this