Spin-echo NMR study of the atomic environment in the Fe100−xBx metallic glass system

In order to investigate the near-neighbor atomic environments, we have measured the 11B spin-echo NMR spectra for the melt-spun Fe100−xBx metallic glass system (14≤x≤22) at 4.2 K over the frequency range 22–46 MHz. The addition of B to Fe100−xBx shifts the peak in the hyperfine field distribution to smaller values by adding intensity to the low field portion of the distribution while leaving the high field portion unchanged. These results, along with 57Fe hyperfine field measurements from Mössbauer experiments are being used to establish a model relating hyperfine fields and structural changes.