Our recently published work in Applied Physics Letters deepens into the magnetism and magnetoelectric coupling of the novel Aurivillius (Bi₂O₂)(A_m-1B_mO_3m+1) compounds with m=3, chemically designed and mechanosynthesized in our group to show room-temperature multiferroism.  We have uncovered a rich phenomenology, involving coexisting magnetic orders, along with a Morin-like transition that correlates with the appearance of relaxor-like characteristics.

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Coexisting magnetic orders and concomitant Morin-like transition and relaxor behavior
in multiferroic Aurivillius Bi4Ti32xNbxFexO12 compounds
M. Algueró, Rafael P. del Real, H. Amorín, A. Castro
Applied Physics Letters 121, 122904 (2022)