Polycrystalline Ni(Cr 1− x Mn x ) 2 O 4 (0.1 ≤ x ≤ 0.325) ceramic samples were studied through different protocols of dc magnetization measurements. The samples exhibit 2 kinds of magnetic compensation effects below the ferrimagnetic transition temperature T C . Remarkable magnetization reversal is observed between the 2 compensation temperatures T comp1 and T comp2 , which is regarded as arising from the negative exchange coupling between the 2 magnetic sublattices at different crystallographic sites. The magnetization is reversed at T SR due to spin‐reorientation caused by magnetostructural coupling. The spin‐reorientation is supported by Mn substitution and T SR is increased to 96 K when x reaches 0.325. However, it is suppressed due to the strong ionic site preference and thus the magnetization is slightly increased in the negative direction of the magnetic field. Near the 2 compensation temperatures, tunable magnetic switching effects can be obtained just by changing the magnitude of the applied magnetic field. Moreover, both normal and inverse magnetocaloric effects were also demonstrated.
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Li et al. (2018) studied this question.
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