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Spin correlations in REAl2 compounds aboveT c

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Abstract

Transverse fieldμSR measurements in the paramagnetic region on polycrystalline samples of CeAl2, NdAl2, PrAl2, GdAl2, ErAl2, HoAl2, DyAl2 and TmAl2 are reported. We have observed increased damping rate and frequency shifts of the muon precession signal asT c is approached from above. The shifts are linear in applied magnetic field, while the damping rates are more complicated functions of magnetic field strength and temperature.

We interpret the damping as being partly due to inhomogeneous broadening proportional to the magnetic susceptibility, and partly due to apparent slowing down of RE spin fluctuations. These slow fluctuations are ascribed to the existence of correlations between the RE spins also at temperatures well aboveT c. The variations of shifts and damping rates within the series of REAl2 compounds will be discussed.

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Authors and Affiliations

  1. University of Uppsala, Sweden

    O. Hartmann, E. Karlsson & R. Wäppling

  2. CENG, Grenoble, France

    J. Chappert & A. Yaouanc

  3. Technical University, Münich, Western Germany

    L. Asch & G. M. Kalvius

Authors
  1. O. Hartmann
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  2. E. Karlsson
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  3. R. Wäppling
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  4. J. Chappert
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  5. A. Yaouanc
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  6. L. Asch
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  7. G. M. Kalvius
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Hartmann, O., Karlsson, E., Wäppling, R. et al. Spin correlations in REAl2 compounds aboveT c . Hyperfine Interact 18, 491–496 (1984). https://doi.org/10.1007/BF02064859

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  • DOI: https://doi.org/10.1007/BF02064859

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