Electronic and magnetic properties of multiferroic ScFeO3

S W Lovesey; D D Khalyavin

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arXiv · 1612.07666

Electronic and magnetic properties of multiferroic ScFeO3

S W Lovesey·D D Khalyavin

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Abstract

Experimental techniques using Bragg diffraction may elucidate electronic and magnetic properties of ferric ions in multiferroic ScFeO3 that are puzzling. A collinear magnetic motif of dipole moments is not expected for s-state ions with an acentric parent (paramagnetic) structure, because single-site anisotropy is negligible and antisymmetric exchange interactions promote an inhomogeneous magnetic motif. However, current indications are that ScFeO3 supports G-type antiferromagnetism, with an unknown moment direction, which implies that ferric ions are not in the high-spin 6S state. It is argued that significant insight on these open questions can be achieved by confronting experimental data with calculated structure factors for resonant x-ray and magnetic neutron Bragg spots, and we report results for G-type antiferromagnetism allowed by the corundum-like parent R3c structure. Calculated structure factors include Dirac multipoles that are time-odd and parity-odd, e.g., dipoles that are often called anapoles or toroidal moments.

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S W Lovesey, D D Khalyavin. 2016-12-22. Electronic and magnetic properties of multiferroic ScFeO3. https://arxiv.org/abs/1612.07666

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