1. Near-Room-Temperature Magnetoelectric Coupling via Spin Crossover in an Iron(II) Complex.
- Author
-
Owczarek M, Lee M, Liu S, Blake ER, Taylor CS, Newman GA, Eckert JC, Leal JH, Semelsberger TA, Cheng HP, Nie W, and Zapf VS
- Abstract
Magnetoelectric coupling is achieved near room temperature in a spin crossover Fe
II molecule-based compound, [Fe(1bpp)2 ](BF4 )2 . Large atomic displacements resulting from Jahn-Teller distortions induce a change in the molecule dipole moment when switching between high-spin and low-spin states leading to a step-wise change in the electric polarization and dielectric constant. For temperatures in the region of bistability, the changes in magnetic and electrical properties are induced with a remarkably low magnetic field of 3 T. This result represents a successful expansion of magnetoelectric spin crossovers towards ambient conditions. Moreover, the observed 0.3-0.4 mC m-2 changes in the H-induced electric polarization suggest that the high strength of the coupling obtained via this route is accessible not just at cryogenic temperatures but also near room temperature, a feature that is especially appealing in the light of practical applications., (© 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.)- Published
- 2022
- Full Text
- View/download PDF