Positive Ion Mobility in Normal Liquid 3He Under High Magnetic Fields

Positive ion mobility in normal liquid 3 He has been measured as a function of external magnetic fields up to 15 T at various pressures and temperatures down to 3 mK. At 20 mK, a monotonic decrease of the mobility with increasing the magnetic field has been observed at the pressures above 10 bars. At 3.2 mK, the field dependence for pressures above 20 bars is found to exhibit a pressure dependent broad peak, followed by a big decrease. Possible origins for these anomalous behaviors are discussed.