Fig. 3

Negative magnetoresistance in CeSb when the magnetic field is applied parallel to the current. a Electrical resistivity as a function of applied field with B||I at various temperatures up to 9 K, showing the onset of negative magnetoresistance in the ferromagnetic (FM) state. The dashed line marks the boundary between the antiferro-ferromagnetic (AFF) and FM states at around 4 T. b Electrical resistivity as a function of applied field for different angles between the applied field and current. At 2 and 6 K, the negative magnetoresistance is destroyed by slightly rotating the angle away from 0°. At 12 K no negative magnetoresistance is observed at any angle up to at least 9 T, while at 30 K negative behaviour is observed at all angles