Publications by Paolo Radaelli

Giant tunability of ferroelectric polarization in GdMn2O5.

Phys Rev Lett 110 (2013) 137203-

N Lee, C Vecchini, YJ Choi, LC Chapon, A Bombardi, PG Radaelli, S-W Cheong

Giant tunability of ferroelectric polarization (ΔP=5000  μC/m2) in the multiferroic GdMn2O5 with external magnetic fields is discovered. The detailed magnetic model from x-ray magnetic scattering results indicates that the Gd-Mn symmetric exchange striction plays a major role in the tunable ferroelectricity of GdMn2O5, which is in distinction from other compounds of the same family. Thus, the highly isotropic nature of Gd spins plays a key role in the giant magnetoelectric coupling in GdMn2O5. This finding provides a new handle in achieving enhanced magnetoelectric functionality.

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