Positive ion mobility in liquid 3He under very high magnetic fields

Positive ion mobility in normal and superfluid 3He has been measured as a function of external magnetic fields up to 15 T at various pressures. At 20 mK, a monotonic increase of the inverse mobility with increasing the magnetic field has been observed at the pressures above 20 bars. Below around 3.2 mK, both in the normal and in the superfluid phase, the field dependence above 20 bars is found to exhibit a pressure dependent dip, followed by a big increase. Possible origins for these anomalous behaviors are discussed