Composition dependent metamagnetism in Co1−xNixCl2·2H2O

Abstract The title system is a mixture of two well-studied antiferromagnets, which exhibit metamagnetic transitions near 31 kG (Co) and 19 kG (Ni), respectively. It is found that in Co 1− x Ni x Cl 2 ·2H 2 O the metamagnetism persists, and that for compositions where the nickel species is a sufficiently large minority component the transition occurs at fields substantially less than for either pure component.