Type-II multiferroism and linear magnetoelectric coupling in the honeycomb Fe4Ta2O9 antiferromagnet

Abstract : Among the numerous exotic phenomena exhibited by honeycomb antiferromagnets, linear magnetoelectricity in niobiates and tantalates of an A(4)M(2)O(9) formula has been attracting a lot of attention. The magnetic frustration, first exploited in alpha-Cr2O3 in the 1960s, can be tuned in the "429" compounds of which structures derive from corundum, by varying the 3d orbitals filling (from 3d(5) to 3d(7) as A goes from Mn2+ to Co2+) and/or the size of the d(0)M cation (Nb5+ or Ta5+). Fe4Ta2O9 illustrates the physics richness of these compounds, as it exhibits a rare combination of multiferroism and linear magnetoelectricity associated to different magnetic field dependences of the electrical polarization.
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Soumis le : vendredi 5 juillet 2019 - 09:54:36
Dernière modification le : jeudi 31 octobre 2019 - 16:48:23

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Antoine Maignan, Christine Martin. Type-II multiferroism and linear magnetoelectric coupling in the honeycomb Fe4Ta2O9 antiferromagnet. Physical Review Materials, American Physical Society, 2018, 2 (9), ⟨10.1103/PhysRevMaterials.2.091401⟩. ⟨hal-02174432⟩

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