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Magnetostriction-polarization coupling in multiferroic Mn2MnWO6
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DOI：10.1038/s41467-017-02003-3.png)
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Abstract
En 中文
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 Ni3TeO6 among the known double corundum compounds to date. Here we address the high-pressure synthesis of a new polar and antiferromagnetic corundum derivative Mn2MnWO6, which adopts the Ni3TeO6-type structure with low temperature first-order field-induced metamagnetic phase transitions (T-N = 58 K) and high spontaneous polarization (similar to 63.3 mu C.cm(-2)). The magnetostrictionpolarization coupling in Mn2MnWO6 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 Mn2MnWO6 show switchable polarization, which motivates further exploration on magnetoelectric effect in single crystal/ thin film specimens.
Keywords:
HIGH-PRESSURE SYNTHESIS
OXYGEN OCTAHEDRAL ROTATIONS
MAGNETIC-STRUCTURE
DOMAIN-STRUCTURES
POLAR
SPIN
PEROVSKITES
BEHAVIOR
DEVICES
SYSTEM
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