Anomalous Pr ordering, Pr L3-edge and Cu K-edge XANES studies for the insulating PrBa2Cu3O7-y system

B. N. Lin; Y. X. Lin; Y. Y. Hsu; J. D. Liao; W. H. Cheng; J. F. Lee; L. Y. Jang; H. C. Ku

doi:10.1023/A:1023470808853

Anomalous Pr ordering, Pr L₃-edge and Cu K-edge XANES studies for the insulating PrBa₂Cu₃O_7-y system

B. N. Lin^*, Y. X. Lin, Y. Y. Hsu, J. D. Liao, W. H. Cheng, J. F. Lee, L. Y. Jang, H. C. Ku

^*Corresponding author for this work

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

12 Citations (Scopus)

Abstract

X-ray absorption near-edge structure (XANES) data for the PrBa₂ Cu₃ O_7-y (6.21 ≤ 7-y ≤ 6.95 insulating system with anomalous Pr antiferromagnetic order are reported. Pr L₃-edge XANES indicates that Pr formal valence decreases from 3.17-3.18 for oxygenated samples to 3.09 for oxygen-depleted PrBa₂Cu₃O_6.43, 3.03 for PrBa₂Cu₃O_6.38 and 3.01 for PrBa₂Cu₃O_6.21. The variation of Pr valence indicates that the doped holes initially stay in the CuO_1-y plane and contribute to Cu(I)-Cu(II) transformation in this plane, but gradually move into the CuO₂ bi-layers with PrO₈ cage and result in the appearance of Pr(IV) localized-hole state with increasing oxygen content. Cu K-edge XANES indicates that the average Cu formal valence increases from less than 2 in oxygen-depleted region to a value larger than 2 for oxygenated samples, with the estimated Cu valence of 2.24 for PrBa₂Cu₃O_6.95. The small average Cu formal valence or large Pr formal valence is closely related to the absence of superconductivity.

Original language	English
Pages (from-to)	803-807
Number of pages	5
Journal	Journal of Low Temperature Physics
Volume	131
Issue number	5-6
DOIs	https://doi.org/10.1023/A:1023470808853
Publication status	Published - 2003 Jun
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics

Access to Document

10.1023/A:1023470808853

Cite this

@article{5a76261e9a6a47cf817c447c30f72b1e,

title = "Anomalous Pr ordering, Pr L3-edge and Cu K-edge XANES studies for the insulating PrBa2Cu3O7-y system",

abstract = "X-ray absorption near-edge structure (XANES) data for the PrBa2 Cu3 O7-y (6.21 ≤ 7-y ≤ 6.95 insulating system with anomalous Pr antiferromagnetic order are reported. Pr L3-edge XANES indicates that Pr formal valence decreases from 3.17-3.18 for oxygenated samples to 3.09 for oxygen-depleted PrBa2Cu3O6.43, 3.03 for PrBa2Cu3O6.38 and 3.01 for PrBa2Cu3O6.21. The variation of Pr valence indicates that the doped holes initially stay in the CuO1-y plane and contribute to Cu(I)-Cu(II) transformation in this plane, but gradually move into the CuO2 bi-layers with PrO8 cage and result in the appearance of Pr(IV) localized-hole state with increasing oxygen content. Cu K-edge XANES indicates that the average Cu formal valence increases from less than 2 in oxygen-depleted region to a value larger than 2 for oxygenated samples, with the estimated Cu valence of 2.24 for PrBa2Cu3O6.95. The small average Cu formal valence or large Pr formal valence is closely related to the absence of superconductivity.",

author = "Lin, {B. N.} and Lin, {Y. X.} and Hsu, {Y. Y.} and Liao, {J. D.} and Cheng, {W. H.} and Lee, {J. F.} and Jang, {L. Y.} and Ku, {H. C.}",

year = "2003",

month = jun,

doi = "10.1023/A:1023470808853",

language = "English",

volume = "131",

pages = "803--807",

journal = "Journal of Low Temperature Physics",

issn = "0022-2291",

publisher = "Springer New York",

number = "5-6",

}

TY - JOUR

T1 - Anomalous Pr ordering, Pr L3-edge and Cu K-edge XANES studies for the insulating PrBa2Cu3O7-y system

AU - Lin, B. N.

AU - Lin, Y. X.

AU - Hsu, Y. Y.

AU - Liao, J. D.

AU - Cheng, W. H.

AU - Lee, J. F.

AU - Jang, L. Y.

AU - Ku, H. C.

PY - 2003/6

Y1 - 2003/6

N2 - X-ray absorption near-edge structure (XANES) data for the PrBa2 Cu3 O7-y (6.21 ≤ 7-y ≤ 6.95 insulating system with anomalous Pr antiferromagnetic order are reported. Pr L3-edge XANES indicates that Pr formal valence decreases from 3.17-3.18 for oxygenated samples to 3.09 for oxygen-depleted PrBa2Cu3O6.43, 3.03 for PrBa2Cu3O6.38 and 3.01 for PrBa2Cu3O6.21. The variation of Pr valence indicates that the doped holes initially stay in the CuO1-y plane and contribute to Cu(I)-Cu(II) transformation in this plane, but gradually move into the CuO2 bi-layers with PrO8 cage and result in the appearance of Pr(IV) localized-hole state with increasing oxygen content. Cu K-edge XANES indicates that the average Cu formal valence increases from less than 2 in oxygen-depleted region to a value larger than 2 for oxygenated samples, with the estimated Cu valence of 2.24 for PrBa2Cu3O6.95. The small average Cu formal valence or large Pr formal valence is closely related to the absence of superconductivity.

AB - X-ray absorption near-edge structure (XANES) data for the PrBa2 Cu3 O7-y (6.21 ≤ 7-y ≤ 6.95 insulating system with anomalous Pr antiferromagnetic order are reported. Pr L3-edge XANES indicates that Pr formal valence decreases from 3.17-3.18 for oxygenated samples to 3.09 for oxygen-depleted PrBa2Cu3O6.43, 3.03 for PrBa2Cu3O6.38 and 3.01 for PrBa2Cu3O6.21. The variation of Pr valence indicates that the doped holes initially stay in the CuO1-y plane and contribute to Cu(I)-Cu(II) transformation in this plane, but gradually move into the CuO2 bi-layers with PrO8 cage and result in the appearance of Pr(IV) localized-hole state with increasing oxygen content. Cu K-edge XANES indicates that the average Cu formal valence increases from less than 2 in oxygen-depleted region to a value larger than 2 for oxygenated samples, with the estimated Cu valence of 2.24 for PrBa2Cu3O6.95. The small average Cu formal valence or large Pr formal valence is closely related to the absence of superconductivity.

UR - http://www.scopus.com/inward/record.url?scp=0037934422&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037934422&partnerID=8YFLogxK

U2 - 10.1023/A:1023470808853

DO - 10.1023/A:1023470808853

M3 - Article

AN - SCOPUS:0037934422

SN - 0022-2291

VL - 131

SP - 803

EP - 807

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

IS - 5-6

ER -

Anomalous Pr ordering, Pr L₃-edge and Cu K-edge XANES studies for the insulating PrBa₂Cu₃O_7-y system

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this