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Transition-metal-only perovskite oxides can introduce additional magnetic functionality with robust magnetoelectric properties but are rare. In this work we prepared a new transition-metal-only perovskite Mn 2 (Fe 0.8 Mo 0.2 )MoO 6 at high pressure and temperature. Uniquely, Mn 2 (Fe 0.8 Mo 0.2 )MoO 6 was discovered as a line phase upon composition modulation that was motivated from the above-room-temperature multiferroic Mn 2 FeMoO 6 corundum phase. It exhibits ferrimagnetic Fe–Mo sublattice ( T C = 194 K) and Mn sublattice antiferromagnetic ( T m ∼ 45 K) transitions. Below T m the two sublattice orderings are coupled and give rise to canted components in both. A first-order field-induced transition is also observed below 45 K. Mn 2 (Fe 0.8 Mo 0.2 )MoO 6 is a Mott variable range hopping semiconductor. These findings for the first time show that either an exotic perovskite or a corundum phase can be achieved by composition modulation besides the pressure effect.
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Li et al. (2018) studied this question.
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