A Magnetic and 57Fe Moessbauer Spectral Study of the Hf1-xRxFe6Ge6 (R = Gd and Dy) Compounds
- Instituto de Ciencia de Materiales de Aragon, CSIC-Universidad de Zaragoza, Centro Politecnico Superior, C/ Maria de Luna, 3. 50018 Zaragoza (Spain)
- Department of Physics, B5, University of Liege, B-4000 Sart-Tilman (Belgium)
We present a detailed magnetic and 57Fe Moessbauer spectroscopy study of the Hf1-xRxFe6Ge6, R = Gd or Dy, series. The macroscopic magnetic measurements are consistent with the magnetic independence of both the R and Fe sublattices. However, the 57Fe Moessbauer study reveals a more complex magnetic behavior. In particular, we have observed that below T = 95 K a spin reorientation process takes place in the non-magnetic member of the series, the HfFe6Ge6 compound. The fit of the corresponding Moessbauer spectra allow us to conclude that at T < 95 K, a fraction {gamma}(T) of the iron moments is deviated from the c-axis. The substitution of Hf by Gd or Dy reduces the fraction {gamma}(T) of the iron canted moments. The hyperfine magnetic fields are found to decrease upon the progressive R = Gd or Dy substitution. This effect can be qualitatively explained as a consequence of the decrease in the hybridization between the d valence states of the R element with the 3d iron states.
- OSTI ID:
- 20722141
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 765; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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