Abstract

The present communication reports isothermal crystal growth experiments in high magnetic fields. We find that both the isothermal linear velocity of growth or dissolution R of a seed of Fe (NH 4) 2 (SO 4) 2 . 6H 2O is increased when a magnetic field H is applied. The magnitude of the increase in R for growth at H = 83 kOe is equivalent to the increase in R obtained by a decrease in temperature of 1°K. The total temperature fluctuation in the experiments is ± 0.05°K. The direction of maximum growth is at an angle of 40–60° relative to H. No satisfactory quantitative model has yet been developed to explain the new experimental data.

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