Abstract
The europium valency in hexagonal EuPtP, as examined byL III-x-ray absorption and Moessbauer experiments, is a function of temperature and changes from 2.16 at 295 K to 2.40 at 4 K. In the region of the strongest temperature dependence of the valency, the compound undergoes two first order phase transitions atT 1=235 K andT 2=190 K, characterized by discontinuities in the lattice constants and in the magnetic susceptibility. In the europium Moessbauer spectra, several temperature dependent absorption lines were found, indicating a complex europium valency behaviour. Furthermore, we observe antiferromagnetic order at 8.6 K.
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Supported by Deutsche Forschungsgemeinschaft through Sonderforschungsbereich 125
Supported by Deutsche Forschungsgemeinschaft
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Lossau, N., Kierspel, H., Langen, J. et al. EuPtP: a new mixed valent europium-system. Z. Physik B - Condensed Matter 74, 227–232 (1989). https://doi.org/10.1007/BF01307389
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DOI: https://doi.org/10.1007/BF01307389