Mn2FeSbO6: a ferrimagnetic ilmenite and an antiferromagnetic perovskite
Abstract
Due of its polymorphism, Mn2FeSbO6 can be synthesized at high pressures and temperatures as a ferrimagnetic ilmenite or an antiferromagnetic perovskite. The structural phase transformation is discussed in detail, and magnetic structures are proposed for both phases. The high-pressure Mn2FeSbO6 polymorph is a rare example of A2 B'B"O6 perovskite with solely Mn cations on the A-site. Fe and Sb cations are ordered on the B-sites. Theoretical calculations for the perovskite phase suggest a complex magnetic structure, holding an electronic polarization.
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