  Metamagnetic behavior has been observed in LiV2O4 powder sample around 38 T
at 4.2 K. On the other hand, magnetization for oxygen deficient LiV2O3.92 shows
no indication of metamagnetism up to 40 T, and shows substantially reduced
magnetic moment compared to that of LiV2O4. These results suggest that
ferromagnetic interaction is strongly enhanced by magnetic fields in LiV2O4,
whereas antiferromagnetic interaction is dominant in LiV2O3.92.
