Hyperfine Interactions in Antiferroquadrupolar Ordering Compound DyB2C2 Studied by 161Dy Moessbauer Spectroscopy on the Y-diluted System

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  • Indoh Kentaro
    Institute for Materials Research, Tohoku University
  • Tobo Aya
    Department of Physics, Graduate School of Science, Tohoku University
  • Ohoyama Kenji
    Institute for Materials Research, Tohoku University
  • Onodera Hideya
    Department of Physics, Graduate School of Science, Tohoku University

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  • Hyperfine Interactions in Antiferroquadrupolar Ordering Compound DyB2C2 Studied by 161Dy Mossbauer Spectroscopy on the Y-diluted System
  • Hyperfine Interactions in Antiferroquadrupolar Ordering Compound DyB<sub>2</sub>C<sub>2</sub>Studied by<sup>161</sup>Dy Mössbauer Spectroscopy on the Y-diluted System

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In order to elucidate quadrupolar and magnetic interactions in the antiferroquadrupolar (AFQ) and antiferromagnetic (AFM) ordering compound DyB2C2, 161Dy Mössbauer spectroscopy was performed on the Y-diluted system Dy1−xYxB2C2. The results reveal that the AFQ and AFM interactions compete with each other. The magnetic hyperfine field that is proportional to the magnetic moment strongly depends on the number and site of Y substitution in the nearest neighbors. Some kinds of Y substitution in the neighbors cause larger hyperfine fields than that in DyB2C2.

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