1. Near‐Room‐Temperature Magnetoelectric Coupling via Spin Crossover in an Iron(II) Complex.
- Author
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Owczarek, Magdalena, Lee, Minseong, Liu, Shuanglong, Blake, Ella R., Taylor, Chloe S., Newman, Georgia A., Eckert, James C., Leal, Juan H., Semelsberger, Troy A., Cheng, Hai‐Ping, Nie, Wanyi, and Zapf, Vivien S.
- Subjects
SPIN crossover ,POLARIZATION (Electricity) ,DIELECTRIC polarization ,ATOMIC displacements ,DIPOLE moments ,IRON ,FERROELECTRICITY - Abstract
Magnetoelectric coupling is achieved near room temperature in a spin crossover FeII 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. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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