High-resolution synchrotron x-ray study of the structure of La1.8Ba0.2CuO4-y

S. C. Moss, K. Forster, J. D. Axe, H. You, D. Hohlwein, D. E. Cox, P. H. Hor, R. L. Meng, C. W. Chu

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

X-ray diffraction of La1.8Ba0.2CuO4-y reveals two macroscopically segregated tetragonal (K2NiF4-type) phases of nearly identical lattice parameter. Many peaks show additional broadening upon cooling. This broadening is consistent with a spontaneous monoclinic distortion, with an onset temperature of 150 K, and is possibly relevant to the superconducting properties. Small single crystals of 70 m diameter within the powder aggregate are also studied and show a similar two-phase constituency and a resolvable peak splitting at low temperature.

Original languageEnglish
Pages (from-to)7195-7198
Number of pages4
JournalPhysical Review B
Volume35
Issue number13
DOIs
Publication statusPublished - 1987

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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