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The aim of this database to sort out all possible reductions of macroscopic magnetic crystallographic symmetry of crystals, and to provide information on the associated changes in the macroscopic property tensors.
Typically, such symmetry reduction is encountered in various phase transitions in crystals. In this case, magnetic Aizu species identify the essence of the group-subgroup relation between the macroscopic symmetry group of the parent phase G and the macroscopic symmetry group of an oriented domain state of the low-symmetry phase F. Subgroups of 122 magnetic crystallographic point group classes generate 1602 such species G > F.
The magnetic Aizu species of interest can be found within the ORDERED LIST or using the search tool summarizing the counts of the non-zero independent components of the selected macroscopic PROPERTY TENSORS of both phases. The database also lists the basic information about the spontaneous VECTOR & BIDIRECTOR PROPERTIES associated with a real or a virtual phase transition belonging to a given species.