Magnetic anisotropy and hyperfine interactions in Ce Fe 2 , Gd Fe 2 , and Lu Fe 2

摘要: M\"ossbauer-effect measurements on $^{57}\mathrm{Fe}$ have been carried out the cubic Laves compounds Ce${\mathrm{Fe}}_{2}$, Gd${\mathrm{Fe}}_{2}$, and Lu${\mathrm{Fe}}_{2}$ between 80 300 K. The analysis of M\"ossbauer spectra allowed determination easy axes magnetization $\stackrel{\ensuremath{\rightarrow}}{\mathrm{n}}$ in these compounds. In is parallel to [100] direction up 150 K; it then becomes type [$\mathrm{uuw}$] with an angle inclination respect axis 20\ifmmode^\circ\else\textdegree\fi{}. Just below Curie temperature at 230 K, this increases 30\ifmmode^\circ\else\textdegree\fi{}. Lu${\mathrm{Fe}}_{2}$, terms phenomenological treatment magnetic anisotropy, presence indicates that bulk magnetic-anisotropy constant ${K}_{3}$ same order magnitude as ${K}_{1}$ ${K}_{2}$. hyperfine parameters three are reported discussed.