Appearance of magnetization jumps in magnetic hysteresis curves in spinel oxide FeV₂ O₄

We report the appearance of magnetization jumps in the magnetic hysteresis curves of the spinel oxide FeV₂ O₄, in which two different magnetic transition ions appeared, both of them having orbital degrees of freedom. The spin-glass-like transition was observed from ac magnetic susceptibilities and the transition temperature was estimated to be T _g =85.5 K. The magnetization jumps appear below 90 K at B=0. In addition, jumps at B=±1.2 T appear below 4.6 K. The magnetization jumps at B=0 may be correlated with spin-glass-like behaviors.