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High-field susceptibility of EuS single crystals

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Abstract

The high-field susceptibility of a cylindrical EuS single crystal was measured in the temperature range between 2.5 K and 16.5 K with applied magnetic fields up to 45 kOe. The measured field dependence of the susceptibility was explained by taking into consideration thermally excited spin waves and the influence of microstructural defects on the spin arrangement. The exchange integral with nearest neighbour and next-nearest neighbour atoms,J=J 1+J2, was determined to be (0.14±0.02)k B(K). This result is in good agreement with the value derived from neutron scattering experiments. The analysis of the influence of different types of crystal defects on the law of approach to ferromagnetic saturation shows that the nonmagnetic inclusions play a dominant role in our case. The deduced density of nonmagnetic inclusions according to the micromagnetic theory agrees well with the result of scanning elecron microscope (SEM) observations.

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Authors and Affiliations

  1. Institut für Physik am Max-Planck-Institut für Metallforschung, D-7000, Stuttgart 80, Fed. Rep. Germany

    H. P. Chang, R. Herz & H. Kronmüller

Authors
  1. H. P. Chang
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  2. R. Herz
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  3. H. Kronmüller
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On leave from Institute of Physics, Academia Sinica, Peking, China

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Chang, H.P., Herz, R. & Kronmüller, H. High-field susceptibility of EuS single crystals. Appl. Phys. 22, 155–160 (1980). https://doi.org/10.1007/BF00885999

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