Y. Aoki et al., MAGNETIC-FIELD EFFECT ON CRYSTALLINE NUCLEATION IN MGCU2-XZNX ALLOYS, Science Reports of the Research Institutes, Tohoku University, Series A: Physics, Chemistry, and Metallurgy, 38(2), 1993, pp. 373-382
By the use of an improved vertical Bridgman growth furnace, the magnet
ic field effect on the formation of crystalline nuclei has been examin
ed for the MgCu2-xZnx alloys with x = 0 and 1.15 in a high magnetic fi
eld of 100 kOe. It was found that the application of magnetic field du
ring the crystallization tends to suppress the formation of crystallin
e nuclei for the MgCu2 alloy (x = 0), in contrast to the increase in t
he number of grains for the MgCu0.85Zn1.15 alloy (x = 1.15). The exper
imental results are qualitatively explained by taking into account the
contribution from the magnetic free energy change accompanying the fo
rmation of a solid froin its liquid.