ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Magnetic properties of RFe6Sn6 compounds (R=Y, Gd, Tb, Dy, Ho, Er, Tm) have been studied by magnetization and Mössbauer spectroscopy. Magnetization curves of isotropic powder samples at room temperature show a linear response up to 1.1 T with a susceptibility of 0.003–0.006 while Mössbauer spectra indicate magnetic order of Fe. These results confirm antiferromagnetic ordering of the compounds below a Néels point of approximately 400 K. The hyperfine fields of Fe at 25 K are ∼22 T, 45% greater than that for the isostructural FeSn although the difference in volume is only 3%. X-ray diffraction and Mössbauer spectra measured on magnetically oriented samples show that strong easy c-axis anisotropy of Fe sublattice dominates the anisotropy of these intermetallic compounds for any of the rare earth elements. A large quadrupole shift (∼0.30 mm/s at room temperature and 0.36 mm/s at 25 K) is consistent with the strong Fe sublattice anisotropy. The first anisotropy constant K1 was estimated to be of order 1.5×106 J/m3. ©1997 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.365164
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