A new tetragonal phase in La-rich Pr2-xLaxCuO4 (1.35 < x < 1.5)

Y. Ikeda, K. Yamada, Y. Kusano, J. Takada

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Comprehensive X-ray diffraction study on the sub-solidus phase diagram in Pr6O11-La2O3-CuO system firstly revealed a new phase of Pr2-xLaxCuO4 for 1.35 < x < 1.5. The phase has a tetragonal symmetry similar to the well-known T′-type structure (0 < x < 0.9). However, the lattice constants of both a and c are clearly distinct between the two tetragonal phases. The new phase coexists with the T′-phase for 0.9 < x < 1.3 and with the orthorhombic T-phase for 1.5 < x < 1.6. The sintered pellet of the new phase instantly transforms into fine powder (∼10 μm) upon cooling from synthesized temperature to room temperature without any compositional phase separation.

Original languageEnglish
Pages (from-to)395-398
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume378-381
Issue numberPART 1
DOIs
Publication statusPublished - Oct 1 2002

Keywords

  • N-type cuprate
  • Phase separation
  • Pr-La-Cu-O system
  • T′-structure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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