Raman measurements of Y1-xEuxBa2Cu3O7: Comparison with Y1-xPrxBa2Cu3O7

In Sang Yang; G. Burns; F. H. Dacol; J. F. Bringley; S. S. Trail

doi:10.1016/0921-4534(90)90452-K

Raman measurements of Y_1-xEu_xBa₂Cu₃O₇: Comparison with Y_1-xPr_xBa₂Cu₃O₇

In Sang Yang, G. Burns, F. H. Dacol, J. F. Bringley, S. S. Trail

Department of Physics

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

10 Scopus citations

Abstract

We present polarized Raman measurements of small single crystals embedded in Y_1-xEu_xBa₂Cu₃O₇ polycrystalline pellets. Superconductivity remains unsuppressed through the entire range of x. With increasing x, the frequency increase of the Ba-Ba vibrational mode and the apical oxygen O_z-O_z vibrational mode, is significantly smaller than in Y_1-xPr_xBa₂ Cu₃O₇, even though similar changes in interatomic distances occur in both systems. These results support the assertion that the frequency changes of Ba-Ba and O_z-O_z modes are due to changes in electronic states and not due to interatomic distances.

Original language	English
Pages (from-to)	31-36
Number of pages	6
Journal	Physica C: Superconductivity and its Applications
Volume	171
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(90)90452-K
State	Published - 15 Oct 1990

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@article{a26e6746e113435a8e91a5e79c5ee6d1,

title = "Raman measurements of Y1-xEuxBa2Cu3O7: Comparison with Y1-xPrxBa2Cu3O7",

abstract = "We present polarized Raman measurements of small single crystals embedded in Y1-xEuxBa2Cu3O7 polycrystalline pellets. Superconductivity remains unsuppressed through the entire range of x. With increasing x, the frequency increase of the Ba-Ba vibrational mode and the apical oxygen Oz-Oz vibrational mode, is significantly smaller than in Y1-xPrxBa2 Cu3O7, even though similar changes in interatomic distances occur in both systems. These results support the assertion that the frequency changes of Ba-Ba and Oz-Oz modes are due to changes in electronic states and not due to interatomic distances.",

author = "Yang, \{In Sang\} and G. Burns and Dacol, \{F. H.\} and Bringley, \{J. F.\} and Trail, \{S. S.\}",

year = "1990",

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doi = "10.1016/0921-4534(90)90452-K",

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T1 - Raman measurements of Y1-xEuxBa2Cu3O7

T2 - Comparison with Y1-xPrxBa2Cu3O7

AU - Yang, In Sang

AU - Burns, G.

AU - Dacol, F. H.

AU - Bringley, J. F.

AU - Trail, S. S.

PY - 1990/10/15

Y1 - 1990/10/15

N2 - We present polarized Raman measurements of small single crystals embedded in Y1-xEuxBa2Cu3O7 polycrystalline pellets. Superconductivity remains unsuppressed through the entire range of x. With increasing x, the frequency increase of the Ba-Ba vibrational mode and the apical oxygen Oz-Oz vibrational mode, is significantly smaller than in Y1-xPrxBa2 Cu3O7, even though similar changes in interatomic distances occur in both systems. These results support the assertion that the frequency changes of Ba-Ba and Oz-Oz modes are due to changes in electronic states and not due to interatomic distances.

AB - We present polarized Raman measurements of small single crystals embedded in Y1-xEuxBa2Cu3O7 polycrystalline pellets. Superconductivity remains unsuppressed through the entire range of x. With increasing x, the frequency increase of the Ba-Ba vibrational mode and the apical oxygen Oz-Oz vibrational mode, is significantly smaller than in Y1-xPrxBa2 Cu3O7, even though similar changes in interatomic distances occur in both systems. These results support the assertion that the frequency changes of Ba-Ba and Oz-Oz modes are due to changes in electronic states and not due to interatomic distances.

UR - https://www.scopus.com/pages/publications/0025505441

U2 - 10.1016/0921-4534(90)90452-K

DO - 10.1016/0921-4534(90)90452-K

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AN - SCOPUS:0025505441

SN - 0921-4534

VL - 171

SP - 31

EP - 36

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 1-2

ER -

Raman measurements of Y1-xEuxBa2Cu3O7: Comparison with Y1-xPrxBa2Cu3O7

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Raman measurements of Y_1-xEu_xBa₂Cu₃O₇: Comparison with Y_1-xPr_xBa₂Cu₃O₇