Magnetic structure studies of ternary borides Er2-xCexFe14B

作者：Krawiec K^*; Pedziwiatr A T; Bogacz B F; Przewoznik J; Zukrowski J; Kapusta Cz

来源：Journal of Magnetism and Magnetic Materials, 2011, 323(23): 2968-2972.

DOI：10.1016/j.jmmm.2011.06.010

• Spin reorientation
• Mossbauer spectroscopy
• Magnetometry

The ternary borides Er2-xCexFe14B (x=0.25, 1, 1.5 and 1.7) have been studied by means of X-ray diffraction, Fe-57 Mossbauer spectroscopy and magnetic measurements in order to verify the postulated occurrence of conical arrangement of magnetic moments in the region of high Ce-composition. Character of spin reorientation phenomena was investigated by means of Fe-57 Mossbauer spectroscopy in the spin reorientation temperature region for polycrystalline and pseudo-single crystal samples. Obtained Mossbauer spectra were analyzed using a procedure of transmission integral. Consistent description of Mossbauer spectra was obtained. Initial magnetization versus temperature measurements (field cooled and zero-field cooled) allowed to estimate the character and temperature regions of reorientation process. The results that are obtained with different methods were compared. The obtained experimental data do not support the hypothesis of conical arrangement of magnetic moments at low temperatures for the compounds with high Ce-composition. Our results are consistent with the current model of spin reorientation in these compounds as a process where magnetic moments rapidly change their orientation from planar to axial arrangement without intermediate conical states.

• 出版日期2011-12