Anomalous Pr Ordering and Structural Analysis for Oxygenated Tetragonal 1212 Compound Pr1.5Ba1.5Cu3O7.2

H. C. Ku, H. M. Luo, Y. P. Chi, B. N. Lin, Y. Y. Hsu, T. J. Lee, J. B. Shi, H. C.I. Kao

研究成果: 雜誌貢獻文章同行評審

3 引文 斯高帕斯(Scopus)

摘要

Magnetic measurement and powder X-ray Rietveld analysis are performed on oxygenated Pri1.5Ba1.5Cu3O7.2 cuprate. This tetragonal compound with lattice parameters a = 0.38916 nm and c = 1.16177 nm is found to form the TlBa2CaCu2O7 1212-type structure when written as Cu[Ba1.5Pr0.5]PrCu2O7.2. Low temperature magnetic data indicate that anomalous Pr order temperature TN(Pr) decreases from 18 K for orthorhombic PrBa2Cu3O6.9 to 10.5 K for Pr1.5Ba1.5Cu3O7.2. The increasing Pr-O bond length with decreasing TN indicates that Pr ordering is closely correlated with the wave function overlap between Pr-4f orbital and O-2pπ orbital in the CuO2 bi-layers.

原文英語
頁(從 - 到)885-889
頁數5
期刊Journal of Low Temperature Physics
117
發行號3-4
出版狀態已發佈 - 1999 十二月 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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