Evidence for new phases in Ln-doped La1.875Ba0.125CuO4 (Ln=Nd, Sm)

N. Hara, T. Kamiyama, I. Kamata, I. Nakahara, H. Hayakawa, Etsuo Akiba, H. Asano

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Abstract

The structure and superconductivity of La1.875-xNdxBa0.125CuO4 (0≤x≤0.20) and La1.875-xSmxBa0.125CuO4 (0≤x≤0.10) have been studied by X-ray diffraction and magnetic susceptibility over a temperature range down to 10 K. Superconductivity does not recover by Nd doping up to x=0.20 and Sm doping up to x=0.10. X-ray diffraction revealed that new structural transitions appear at low temperature. La1.835Nd0.04Ba0.125CuO4 undergoes the discontinuous orthorhombic (MTO) - > tetragonal (LTT1) transition at about 65 K, the LTT1 - > orthorhombic (LTO) transition at about 50 K, and then the continuous LTO - > tetragonal (LTT2) transition at about 30 K. In the case of La1.875-xNdxBa0.125CuO4 (0.06≤x≤0.20) and La1.875-xSmxBa0.125CuO4 (0<x≤0.10), the lowest-temperature phase is LTO.

Original languageEnglish
Pages (from-to)975-978
Number of pages4
JournalSolid State Communications
Volume82
Issue number12
DOIs
Publication statusPublished - Jan 1 1992

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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