Surface tension of heavy water under high magnetic fields

The surface tension of deuterium oxide-air interface was precisely measured under magnetic fields up to 10 T. The surface tension increased by 2.37 +/- 0.14 mN/m (3.30 +/- 0.19%) at 10 T. It was found that the surface tension increased linearly with an increase in the square of the magnetic field, the proportionality constant of which showed a marked isotope effect.