The anisotropic Hall effect and magnetization have been investigated for single crystals of [Formula presented] under high magnetic fields up to 27 T and at low temperatures down to 50 mK. The magnetization curves indicate that the Nd moments with strong Ising anisotropy are coupled antiferromagnetically with the Mo spins and show field-induced flipping on the respective sites. The Hall resistivity changes its sign with increasing field applied along the  direction, while it monotonously approaches zero with the field applied along the  or  direction. This behavior is in accord with the prediction by the Berry phase theory and is interpreted in terms of the field-induced reversal of spin chirality on the pyrochlore lattice.
ASJC Scopus subject areas
- Physics and Astronomy(all)