Measurements of the hyperfine magnetic fields at Ta and Fe in the Laves compounds ($ Zr_{x} $ $ Hf_{1−x} $)$ Fe_{2} $ for 0≤x≤1

Abstract The hyperfine magnetic fields $ at^{181} $Ta $ and^{57} $Fe in the ferromagnetic Laves intermetallic compounds ($ Zr_{x} %$ Hf_{1−x} $)$ Fe_{2} $ (0≤x≤1) have been measured by the methods of TDPAC and Mössbauer effect, respectively, and shown to be practically independent of x at x≥0.4. An...
Ausführliche Beschreibung

Abstract The hyperfine magnetic fields $ at^{181} $Ta $ and^{57} $Fe in the ferromagnetic Laves intermetallic compounds ($ Zr_{x} %$ Hf_{1−x} $)$ Fe_{2} $ (0≤x≤1) have been measured by the methods of TDPAC and Mössbauer effect, respectively, and shown to be practically independent of x at x≥0.4. An average value $ B_{hf} $ (Ta)=−6.52 T at 300 K was obtained for samples with x≥0.4, and −14.2 T for pure $ HfFe_{2} $ in the hexagonal C14 modification. For 0<x<0.4, a superposition of both field components was observed. A deviation of the temperature dependence of $ B_{hf} $(Ta) in ($ Zr_{0.9} $ $ Hf_{0.1} $)$ Fe_{2} $ from that for $ B_{hf} $ (Fe) and the bulk magnetization was confirmed, studied in detail, and shown to exist for all x≥0.4. The temperature dependence of $ B_{hf} $(Ta) in $ HfFe_{2} $ was close to that of $ B_{hf} $ (Fe). Ausführliche Beschreibung