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Crystal structure and magnetic properties of (Ru0.5Cu0.5)(Sr1.47Ba0.2R0.33)(R1.34Ce0.66)Cu2O z (R = Nd, Eu)

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Abstract

The crystal structure and the superconducting and magnetic properties of (Ru0.5Cu0.5)(Sr1.47- Ba0.2R0.33)(R1.34Ce0.66)Cu2O z with R = Nd and Eu samples have been investigated by using X-ray powder diffraction techniques and by using resistivity and magnetization measurements. The Rietveld refinement of the X-ray diffraction data showed that the rotation angle of the Ru octahedron around the c-axis for the R = Nd sample was higher than that of the R = Eu sample. The heat treatment of the R = Nd sample under a N2 atmosphere led to an increase in the rotation angle, in contrast to the decrease in the rotation angle for the R = Eu sample. The dc magnetic susceptibility measurements for the R = Eu sample after the N2 treatment showed weak ferromagnetic behavior at temperatures below about 80 K whereas the N2-treated R = Nd sample exhibited paramagnetic behavior. The experimental results are discussed in connection with local structural changes in the samples.

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Authors and Affiliations

  1. Department of Physics, Kangwon National University, Chuncheon, 200-701, Korea

    H. K. Lee

  2. Korea Research Institute of Standards and Science, Daejeon, 305-340, Korea

    Y. I. Kim

Authors
  1. H. K. Lee
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  2. Y. I. Kim
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Correspondence to H. K. Lee.

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Lee, H.K., Kim, Y.I. Crystal structure and magnetic properties of (Ru0.5Cu0.5)(Sr1.47Ba0.2R0.33)(R1.34Ce0.66)Cu2O z (R = Nd, Eu). Journal of the Korean Physical Society 61, 1709–1713 (2012). https://doi.org/10.3938/jkps.61.1709

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  • DOI: https://doi.org/10.3938/jkps.61.1709

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