Temperature dependence of the local structure ofYBa2Cu3O7−δwith varying oxygen content: An x-ray-absorption study

Temperature dependence of local structure of the CuO 2 plane has been studied by in plane polarized (E//ab) Cu K-edge extended X-ray absorption fine structure (EXAFS) experiments on an under-doped single crystal of superconducting La1.87Sr0.13CuO 4-y system with T c =32 K . The temperature dependence of the Debye–Waller factors for the Cu-O and Cu-La/Sr pairs are determined. We find that the motion of Cu and O atoms in the Cu-O bond is partially correlated at higher temperatures, going over to an uncorrelated motion at lower temperatures. The results are discussed in terms of the local lattice instabilities and stripes as reported in other systems.

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Local structure anomalies of the BaBi(Pb)O3 system at low temperatures: an X-ray absorption study

Physica C Superconductivity ◽

10.1016/s0921-4534(97)00083-x ◽

1997 ◽

Vol 277 (3-4) ◽

pp. 257-264 ◽

Cited By ~ 15

Author(s):

A.P. Menushenkov ◽

S. Benazeth ◽

J. Purans ◽

A.Yu. Ignatov ◽

K.V. Klementev

Keyword(s):

Local Structure ◽

Low Temperatures ◽

Absorption Study ◽

X Ray ◽

X Ray Absorption

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The Fe K-edge X-ray absorption study of the local structure of BaFe0.5Nb0.5O3

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2017.02.026 ◽

2017 ◽

Vol 193 ◽

pp. 260-266 ◽

Cited By ~ 7

Author(s):

V.A. Shuvaeva ◽

I.P. Raevski ◽

O.E. Polozhentsev ◽

Ya.V. Zubavichus ◽

V.G. Vlasenko ◽

...

Keyword(s):

Local Structure ◽

Absorption Study ◽

X Ray ◽

X Ray Absorption

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X-Ray Absorption Study of Y1Ba2Cu3O7 and Gd1Ba2Cu3O7 Superconductors

MRS Proceedings ◽

10.1557/proc-99-943 ◽

1987 ◽

Vol 99 ◽

Author(s):

J. B. Boyce ◽

F. Bridges ◽

T. Claeson ◽

R. S. Howland ◽

T. H. Geballe

Keyword(s):

Diffraction Data ◽

Local Structure ◽

Absorption Study ◽

X Ray ◽

Significant Difference ◽

Atomic Vibrations ◽

Einstein Temperature ◽

X Ray Absorption ◽

Absorption Measurements

ABSTRACTX-ray absorption measurements of the high-Tc superconductors Y1Ba2Cu3O7-δ and Gd1Ba2Cu3O7-δ are essentially identical and show no significant difference in either near-edge or local structure from 4.2K to 688K. The position of the Cu edge suggests that the Cu valence in the superconductors is between that in CuO (formal valence of II) and that in KCuO2 (formal valence of III). Our EXAFS structural results agree well with the diffraction data. From the atomic vibrations, we find that the 2D Cu-O planes and the ID Cu-O chains form the most rigid parts of the structure, with an Einstein temperature of about 560K, compared with 390K for the Y-O bonds, 320K for Ba-O, and 260K for Cu-Cu and Y-Cu.

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Temperature dependence of the local structure in superconducting and non-superconducting Tl2Ba2CuOy studied by extended x-ray absorption fine structure

Physica C Superconductivity ◽

10.1016/0921-4534(93)90455-y ◽

1993 ◽

Vol 213 (3-4) ◽

pp. 375-382 ◽

Cited By ~ 20

Author(s):

Hirotaka Yamaguchi ◽

Satoru Nakajima ◽

Yuji Kuwahara ◽

Hiroyuki Oyanagi ◽

Yasuhiko Syono

Keyword(s):

Fine Structure ◽

Temperature Dependence ◽

Local Structure ◽

X Ray ◽

Absorption Fine ◽

X Ray Absorption

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Local structure and size effects in nanophase palladium: An X-ray absorption study

Physics Letters A ◽

10.1016/0375-9601(95)00708-b ◽

1995 ◽

Vol 207 (6) ◽

pp. 397-403 ◽

Cited By ~ 26

Author(s):

S. de Panfilis ◽

F. d'Acapito ◽

V. Haas ◽

H. Konrad ◽

J. Weissmüller ◽

...

Keyword(s):

Size Effects ◽

Local Structure ◽

Absorption Study ◽

X Ray ◽

X Ray Absorption

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Temperature-dependent EXAFS study of the local structure and lattice dynamics in cubic Y2O3

Journal of Synchrotron Radiation ◽

10.1107/s1600577516001181 ◽

2016 ◽

Vol 23 (2) ◽

pp. 510-518 ◽

Cited By ~ 8

Author(s):

Inga Jonane ◽

Karlis Lazdins ◽

Janis Timoshenko ◽

Alexei Kuzmin ◽

Juris Purans ◽

...

Keyword(s):

Molecular Dynamics ◽

Temperature Dependence ◽

Local Structure ◽

Lattice Dynamics ◽

Reverse Monte Carlo ◽

Temperature Dependent ◽

X Ray ◽

Exafs Study ◽

X Ray Absorption ◽

Reverse Monte Carlo Method

The local structure and lattice dynamics in cubic Y2O3were studied at the YK-edge by X-ray absorption spectroscopy in the temperature range from 300 to 1273 K. The temperature dependence of the extended X-ray absorption fine structure was successfully interpreted using classical molecular dynamics and a novel reverse Monte Carlo method, coupled with the evolutionary algorithm. The obtained results allowed the temperature dependence of the yttria atomic structure to be followed up to ∼6 Å and to validate two force-field models.

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