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Double corundum-related polar magnets are promising materials for multiferroic and magnetoelectric applications in spintronics. However, their design and synthesis is a challenge, and magnetoelectric coupling has only been observed in Ni 3 TeO 6  among the known double corundum compounds to date. Here we address the high-pressure synthesis of a new polar and antiferromagnetic corundum derivative Mn 2 MnWO 6 , which adopts the Ni 3 TeO 6 -type structure with low temperature first-order field-induced metamagnetic phase transitions ( T   N  = 58 K) and high spontaneous polarization (~ 63.3 μC·cm −2 ). The magnetostriction-polarization coupling in Mn 2 MnWO 6  is evidenced by second harmonic generation effect, and corroborated by magnetic-field-dependent pyroresponse behavior, which together with the magnetic-field-dependent polarization and dielectric measurements, qualitatively indicate magnetoelectric coupling. Piezoresponse force microscopy imaging and spectroscopy studies on Mn 2 MnWO 6  show switchable polarization, which motivates further exploration on magnetoelectric effect in single crystal/thin film specimens.

Magnetostriction-polarization coupling in multiferroic Mn2MnWO6