Electric Field Gradients and Structural Anisotropy in Amorphous Fe(Cr)-B and Fe(Cr)-P Alloys Studied by ^<57>Fe Mossbauer Spectroscopy
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^<57>Fe Mossbauer spectroscopic study has been performed on the distribution of electric quadrupole splittings in melt-quenched amorphous (Fe_<0.7>Cr_<0.3>)_<100-x>B_x (11.2≦x≦20.9) and (Fe_<0.7>Cr_<0.3>)_<100-x>P_x (13.5≦x≦21.9) alloy ribbons which are paramagnetic at room temperature. Results have not supported the structure model of dense random packing, but been interpreted by the short range order model which are described as the compositions of Fe_4B (or Fe_<23>B_6) and Fe_3P in Fe(Cr)-B and Fe(Cr)-P alloys, respectively. The spectra of asymmetric doublet have revealed that there are structural anisotropies as well as the Gordanskii-Karyagin effects in the amorphous ribbons. From the angular dependences of spectrum, the structural isotropies are attained at the compositions around x=16 and x=18 in Fe(Cr)-B and Fe(Cr)-P alloys, respectively.
- 東北大学の論文
- 1992-03-25
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