High-temperature ferroelectricity and strong magnetoelectric effects in a hybrid organic-inorganic perovskite framework

A Cu-based organic–inorganic perovskite framework exhibits high-temperature ferroelectricity with strong magnetoelectric effects. Both electric field control of magnetization and magnetic field control of polarization are realized. Theoretical calculations suggest that a new mechanism of hybrid improper ferroelectricity arising from the Jahn–Teller distortions of magnetic metal ions and tilting of the organic cations are responsible for the peculiar multiferroic behaviors. A Cu-based perovskite organic–inorganic framework showing high-temperature improper ferroelectricity. (© 2015 WILEY-VCH Verlag GmbH &Co. KGaA, Weinheim)