New approach for designing bulk multiferroic composites made of two perovskite oxides with enhanced direct magnetoelectric coupling

Microstructures and physical properties of sol–gel derived Ba2FeMnO6 double perovskite

“…[2][3][4] Unfortunately, there is a scarcity of such single-phase perovskite multiferroics in nature due to the issue of d o versus d n (the mutual exclusivity of the origins for ferroelectricity and ferromagnetism). 5,6 One possible route to solve the above issue is the development of B-site ordered A 2 B′B″O 6 double perovskite (DP) oxides, where A-site cation is 12-coordinated and the B-site (B′ and B″) cations are 6-coordinated with oxygen. 7 An ordered arrangement of B′ and B″ cations along the [1 1 1] direction generates a rock-salt structure in the DP oxides with large differences in the charge and/or ionic radii between the B′ and B″ cations.…”

“…In the magnetoelectric multiferroic perovskite oxides, one can switch the spontaneous electrical polarization by external magnetic fields or vice versa, thus, such unique properties make them extremely useful for multistate memories, spintronic devices, and photovoltaic cells 2–4 . Unfortunately, there is a scarcity of such single‐phase perovskite multiferroics in nature due to the issue of d o versus d n (the mutual exclusivity of the origins for ferroelectricity and ferromagnetism) 5,6 . One possible route to solve the above issue is the development of B‐site ordered A 2 B′B″O 6 double perovskite (DP) oxides, where A‐site cation is 12‐coordinated and the B‐site (B′ and B″) cations are 6‐coordinated with oxygen 7 .…”