JETP Letters

, Volume 93, Issue 3, pp 139–143 | Cite as

The low-temperature macroscopic phase separation in La0.5Ba0.5CoO3 − δ cobaltite

  • I. O. Troyanchuk
  • D. V. Karpinsky
  • M. V. Bushinsky
  • V. Sikolenko
  • V. Efimov
  • A. Cervellino
Condensed Matter

Abstract

La0.5Ba0.5CoO2.87 has been characterized with neutron and synchrotron powder diffraction and magnetization measurements. This compound was shown to have a cubic crystal structure at temperatures above 200 K whereas slightly above the Curie point Tc ∼ 170 K the structural separation into two different pseudocubic phases gradually develops upon cooling. The structural transformation is reversible. At 2 K the sample consists of G-type antiferromagnetic oxygen-poor and ferromagnetic oxygen-rich phases (approximately 33 and 66%, respectively).

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Copyright information

© Pleiades Publishing, Ltd. 2011

Authors and Affiliations

  • I. O. Troyanchuk
    • 1
  • D. V. Karpinsky
    • 1
  • M. V. Bushinsky
    • 1
  • V. Sikolenko
    • 2
    • 3
  • V. Efimov
    • 3
  • A. Cervellino
    • 4
  1. 1.SSPA “Scientific-Practical Materials Research Center, National Academy of Sciences of Belarus,”MinskBelarus
  2. 2.Laboratory for Neutron ScatteringETH Zurich and Paul Sherrer InstituteVilligenSwitzerland
  3. 3.Joint Institute for Nuclear ResearchDubna, Moscow regionRussia
  4. 4.Swiss Light SourcePaul Sherrer InstituteVilligenSwitzerland

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