Magnetic susceptibility of CoFeBSiNb alloys in liquid state

• Bulk metallic glasses from CoFeBSiNb-based alloys were produced as in situ composites.
• Magnetic susceptibility of these alloys was measured in a wide temperature range including liquid state.
• Undercooling of these melts was measured experimentally.
• Ga additions strengthen interatomic interaction in BMG melts, whereas Sb atoms reduce it.

The influence of small additions of gallium and antimony on magnetic susceptibility of the bulk glass forming Co47Fe20.9B21.2Si4.6Nb6.3 alloy was studied in a wide temperature range up to 1830 K by the Faraday’s method. The undercooling for all the samples was measured experimentally. Both Ga and Sb additions were found to increase liquidus and solidification temperatures. However, gallium atoms strengthen interatomic interaction in the melts, whereas antimony atoms reduce it.