Fig. 5: ME phase transition by the engineering of interfacial DMI.
From: Magnetoelectric phase transition driven by interfacial-engineered Dzyaloshinskii-Moriya interaction
a, b Temperature-dependent spontaneous polarization and ME response for I1.5/T3, I3/T6, I3/B6, and I3/B8 superlattices, respectively. The temperature of ME phase transition could be increased from 46 to 203 K by the enhancement of polarization (from 0.04 to 1.62 µC/cm2). The polarization was obtained by the integration of pyroelectric current. c BLS spectra of the I3/B6 superlattice. The difference of frequency (\({\triangle f}\) = 0.42 GHz) is twice larger than the one in I3/T6 superlattice (\({\triangle f}\) = 0.19 GHz), demonstrating the enhancement of interfacial DMI due to the increased polarization of the I3/B6 superlattice. d The ME phase diagram. The error bars in (c) and (d) are standard errors of measurements.
