Dynamical magnetic correlations in the Kondo insulator YbB12

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1999 EDP Sciences
, , Citation A. Yaouanc et al 1999 EPL 47 247 DOI 10.1209/epl/i1999-00379-x

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Author affiliations

1 Commissariat à l'Energie Atomique, Département de Recherche Fondamentale sur la Matière Condensée, Service de Physique Statistique, Magnétisme et Supraconductivité F-38054 Grenoble Cedex 9, France

2 Commissariat à l'Energie Atomique, Département de Recherche sur l'Etat Condensé, les Atomes et les Molécules - F-91191 Gif-sur-Yvette, France

3 Interfacultair Reactor Instituut, Delft University of Technology 2629 JB Delft, The Netherlands

4 Department of Physics, Faculty of Science, Tohoku University Sendai 980, Japan

Dates

  1. Received 15 February 1999
  2. Accepted 12 May 1999
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0295-5075/47/2/247

Abstract

Positive muon spectroscopy (μSR) and 170Yb Mössbauer absorption measurements have been performed in the cubic Kondo insulator YbB12 down to the 50 mK temperature range. We observe a paramagnetic fluctuation mode at low temperature, with a weak moment amplitude ( ≈ 10−2 μB) and a slow fluctuation frequency ( ≈ 60 MHz) which remains constant between 0.04 K and 4.2 K. No indication of a magnetic phase transition is found down to 0.04 K.

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10.1209/epl/i1999-00379-x