Effect of Pr-O hybridization on the anomalous magnetic properties of Pr 1+xBa 2-xCu 3O 7-y system

H. C. Ku; B. N. Lin; Y. X. Lin; Y. Y. Hsu

doi:10.1063/1.1450783

Effect of Pr-O hybridization on the anomalous magnetic properties of Pr _1+xBa _2-xCu ₃O _7-y system

H. C. Ku^*, B. N. Lin, Y. X. Lin, Y. Y. Hsu

^*Corresponding author for this work

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

6 Citations (Scopus)

Abstract

The Pr L ₃-edge x-ray absorption near edge structure spectra and antiferromagnetic T _N(Pr) data for the parent system PrBa ₂Cu ₃O _7-y (0≤y<1) and the oxygenated system Pr _1+xBa _2-xCu ₃O _7-y (0≤x≤1;-0.27≤y≤0.05) are reported. The formal Pr valence in the PrO ₈ cage decreases from 3.18 for PrBa ₂Cu ₃O _6.95 [T _N(Pr)=18.5 K], to 3.12 for Pr _1.2Ba _1.8Cu ₃O _6.98 (15.5 K), 3.03 for Pr _1.6Ba _1.4Cu ₃O _7.16 (8 K), and 3.00 for Pr ₂BaCu ₃O _7.27 [T _N(Pr) not observed]. The Pr valence depends both on the number of holes available in the PrO ₈ cage and the Pr 4f-O 2p _π hybridization strength. On the other hand, anomalous T _N(Pr) is a direct result of exchange interaction though Pr-O-Pr hybridization. However, the relative contribution from Pr ^IV-Pr ^IV superexchange via strong Pr-O orbital hybridization and Pr ^III-Pr ^III/Pr ^III-Pr ^IV superexchange paths is unclear.

Original language	English
Pages (from-to)	7128-7130
Number of pages	3
Journal	Journal of Applied Physics
Volume	91
Issue number	10 I
DOIs	https://doi.org/10.1063/1.1450783
Publication status	Published - 2002 May 15
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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@article{bcc1638619154100853ccaa1f61f8dd4,

title = "Effect of Pr-O hybridization on the anomalous magnetic properties of Pr 1+xBa 2-xCu 3O 7-y system",

abstract = "The Pr L 3-edge x-ray absorption near edge structure spectra and antiferromagnetic T N(Pr) data for the parent system PrBa 2Cu 3O 7-y (0≤y<1) and the oxygenated system Pr 1+xBa 2-xCu 3O 7-y (0≤x≤1;-0.27≤y≤0.05) are reported. The formal Pr valence in the PrO 8 cage decreases from 3.18 for PrBa 2Cu 3O 6.95 [T N(Pr)=18.5 K], to 3.12 for Pr 1.2Ba 1.8Cu 3O 6.98 (15.5 K), 3.03 for Pr 1.6Ba 1.4Cu 3O 7.16 (8 K), and 3.00 for Pr 2BaCu 3O 7.27 [T N(Pr) not observed]. The Pr valence depends both on the number of holes available in the PrO 8 cage and the Pr 4f-O 2p π hybridization strength. On the other hand, anomalous T N(Pr) is a direct result of exchange interaction though Pr-O-Pr hybridization. However, the relative contribution from Pr IV-Pr IV superexchange via strong Pr-O orbital hybridization and Pr III-Pr III/Pr III-Pr IV superexchange paths is unclear.",

author = "Ku, {H. C.} and Lin, {B. N.} and Lin, {Y. X.} and Hsu, {Y. Y.}",

year = "2002",

month = may,

day = "15",

doi = "10.1063/1.1450783",

language = "English",

volume = "91",

pages = "7128--7130",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics Publising LLC",

number = "10 I",

}

TY - JOUR

T1 - Effect of Pr-O hybridization on the anomalous magnetic properties of Pr 1+xBa 2-xCu 3O 7-y system

AU - Ku, H. C.

AU - Lin, B. N.

AU - Lin, Y. X.

AU - Hsu, Y. Y.

PY - 2002/5/15

Y1 - 2002/5/15

N2 - The Pr L 3-edge x-ray absorption near edge structure spectra and antiferromagnetic T N(Pr) data for the parent system PrBa 2Cu 3O 7-y (0≤y<1) and the oxygenated system Pr 1+xBa 2-xCu 3O 7-y (0≤x≤1;-0.27≤y≤0.05) are reported. The formal Pr valence in the PrO 8 cage decreases from 3.18 for PrBa 2Cu 3O 6.95 [T N(Pr)=18.5 K], to 3.12 for Pr 1.2Ba 1.8Cu 3O 6.98 (15.5 K), 3.03 for Pr 1.6Ba 1.4Cu 3O 7.16 (8 K), and 3.00 for Pr 2BaCu 3O 7.27 [T N(Pr) not observed]. The Pr valence depends both on the number of holes available in the PrO 8 cage and the Pr 4f-O 2p π hybridization strength. On the other hand, anomalous T N(Pr) is a direct result of exchange interaction though Pr-O-Pr hybridization. However, the relative contribution from Pr IV-Pr IV superexchange via strong Pr-O orbital hybridization and Pr III-Pr III/Pr III-Pr IV superexchange paths is unclear.

AB - The Pr L 3-edge x-ray absorption near edge structure spectra and antiferromagnetic T N(Pr) data for the parent system PrBa 2Cu 3O 7-y (0≤y<1) and the oxygenated system Pr 1+xBa 2-xCu 3O 7-y (0≤x≤1;-0.27≤y≤0.05) are reported. The formal Pr valence in the PrO 8 cage decreases from 3.18 for PrBa 2Cu 3O 6.95 [T N(Pr)=18.5 K], to 3.12 for Pr 1.2Ba 1.8Cu 3O 6.98 (15.5 K), 3.03 for Pr 1.6Ba 1.4Cu 3O 7.16 (8 K), and 3.00 for Pr 2BaCu 3O 7.27 [T N(Pr) not observed]. The Pr valence depends both on the number of holes available in the PrO 8 cage and the Pr 4f-O 2p π hybridization strength. On the other hand, anomalous T N(Pr) is a direct result of exchange interaction though Pr-O-Pr hybridization. However, the relative contribution from Pr IV-Pr IV superexchange via strong Pr-O orbital hybridization and Pr III-Pr III/Pr III-Pr IV superexchange paths is unclear.

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Effect of Pr-O hybridization on the anomalous magnetic properties of Pr _1+xBa _2-xCu ₃O _7-y system

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