Multiferroics exhibit more than one primary ferroic property at the same time: ferromagnetism, ferroelectricity and ferroelasticity. Most materials of interest are magnetoelectric. Prime examples are Barium Titanate (BaTiO₃) and Bismuth Iron Oxide (BiFeO₃).

Logic devices made from multiferroics promise to be 10 to 100 times more energy efficient than the current CMOS technology will ever be. The magnetoelectric spin-orbit devices avoid what is known as Boltzmann's tyranny for the subthreshold slope and can also be made smaller (Manipatruni et al, Nature 565, 35-42, 2019).

Other applications are low-power reconfigurable antiferromagnetic spintronic devices.

The small size and low field of spin cycloids in multiferroic BiFeO makes the material a test bed for the performance of an NV microscope. Quantitative NV magnetometry helps to understand the influence of the different physical parameters that create these cycloids.