### Abstract

The Pr L _{3}-edge x-ray absorption near edge structure spectra and antiferromagnetic T _{N}(Pr) data for the parent system PrBa _{2}Cu _{3}O _{7-y} (0≤y<1) and the oxygenated system Pr _{1+x}Ba _{2-x}Cu _{3}O _{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 _{2}Cu _{3}O _{6.95} [T _{N}(Pr)=18.5 K], to 3.12 for Pr _{1.2}Ba _{1.8}Cu _{3}O _{6.98} (15.5 K), 3.03 for Pr _{1.6}Ba _{1.4}Cu _{3}O _{7.16} (8 K), and 3.00 for Pr _{2}BaCu _{3}O _{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 | |

Publication status | Published - 2002 May 15 |

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### ASJC Scopus subject areas

- Physics and Astronomy(all)

### Cite this

_{1+x}Ba

_{2-x}Cu

_{3}O

_{7-y}system.

*Journal of Applied Physics*,

*91*(10 I), 7128-7130. https://doi.org/10.1063/1.1450783

**Effect of Pr-O hybridization on the anomalous magnetic properties of Pr _{1+x}Ba _{2-x}Cu _{3}O _{7-y} system.** / Ku, H. C.; Lin, B. N.; Lin, Y. X.; Hsu, Yung-Yuan.

Research output: Contribution to journal › Article

_{1+x}Ba

_{2-x}Cu

_{3}O

_{7-y}system',

*Journal of Applied Physics*, vol. 91, no. 10 I, pp. 7128-7130. https://doi.org/10.1063/1.1450783

_{1+x}Ba

_{2-x}Cu

_{3}O

_{7-y}system. Journal of Applied Physics. 2002 May 15;91(10 I):7128-7130. https://doi.org/10.1063/1.1450783

}

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, Yung-Yuan

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.

UR - http://www.scopus.com/inward/record.url?scp=0037094910&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037094910&partnerID=8YFLogxK

U2 - 10.1063/1.1450783

DO - 10.1063/1.1450783

M3 - Article

AN - SCOPUS:0037094910

VL - 91

SP - 7128

EP - 7130

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 10 I

ER -