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

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Abstract

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.

Original languageEnglish
Pages (from-to)885-889
Number of pages5
JournalJournal of Low Temperature Physics
Volume117
Issue number3-4
Publication statusPublished - 1999 Dec 1

ASJC Scopus subject areas

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

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    Ku, H. C., Luo, H. M., Chi, Y. P., Lin, B. N., Hsu, Y. Y., Lee, T. J., Shi, J. B., & Kao, H. C. I. (1999). Anomalous Pr Ordering and Structural Analysis for Oxygenated Tetragonal 1212 Compound Pr1.5Ba1.5Cu3O7.2. Journal of Low Temperature Physics, 117(3-4), 885-889.