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Mössbauer spectroscopy of Fe-doped valence-fluctuating α-YbAlB4

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Abstract

The magnetic properties of high-quality ∼25 at.% Fe doped α-YbAlB4 with an orthorhombic Pbam structure were investigated by using magnetization measurements and 57Fe Mössbauer spectroscopy. The temperature dependence of the magnetization along the a-axis showed anomalies at T N2 ∼ 7.7 K and T N1 ∼ 10.4 K. Broadenings of the peaks in the Mössbauer spectrum were observed at temperatures below 6 K, which were due to the magnetic hyperfine fields transferred from the Yb magnetic moments. The evaluated transferred magnetic hyperfine field almost disappears around T N2. The anomalous temperature dependence of the transferred magnetic hyperfine field reveals that the magnetic structure and the ordered magnetic moments of the Yb ions show complex temperature dependences at temperatures below T N1.

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Authors and Affiliations

  1. Center for Novel Material Science under Multi-extreme Conditions, Graduate School of Material Science, University of Hyogo, 3-2-1 Koto, Hyogo, 678-1297, Japan

    Yui Sakaguchi, Shugo Ikeda & Hisao Kobayashi

  2. Institute for Solid State Physics, University of Tokyo, Kashiwa, 277-8581, Japan

    Kentaro Kuga, Keita Sone & Satoru Nakatsuji

Authors
  1. Yui Sakaguchi
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  2. Shugo Ikeda
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  3. Hisao Kobayashi
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  4. Kentaro Kuga
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  5. Keita Sone
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  6. Satoru Nakatsuji
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Correspondence to Yui Sakaguchi.

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Sakaguchi, Y., Ikeda, S., Kobayashi, H. et al. Mössbauer spectroscopy of Fe-doped valence-fluctuating α-YbAlB4 . Journal of the Korean Physical Society 62, 2146–2149 (2013). https://doi.org/10.3938/jkps.62.2146

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  • DOI: https://doi.org/10.3938/jkps.62.2146

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