Multiferroic Compounds with Double-Perovskite Structures

High pressure synthesis, structure, and multiferroic properties of two perovskite compounds Y2FeMnO6 and Y2CrMnO6.

High purity crystals of Y2FeMnO6 (YFMO) and Y2CrMnO6 (YCMO) have been synthesized for the first time using a flux method under a high temperature of 1573 K and high pressure of 6 GPa. Both YFMO and YCMO have orthorhombic structures in space group Pnma. The temperature-dependent magnetization and the nonlinear M-H hysteresis loops of both materials indicate that an antiferromagnetic transition o...

A novel perovskite oxide chemically designed to show multiferroic phase boundary with room-temperature magnetoelectricity

There is a growing activity in the search of novel single-phase multiferroics that could finally provide distinctive magnetoelectric responses at room temperature, for they would enable a range of potentially disruptive technologies, making use of the ability of controlling polarization with a magnetic field or magnetism with an electric one (for example, voltage-tunable spintronic devices, unc...

Studies of structures, transport and magnetic properties of doped novel three-dimensional perovskite compounds

Metal-Insulator Transition in Mn Perovskite Compounds

We discuss Mott insulating and metallic phases of a model with eg orbital degeneracy to understand physics of Mn perovskite compounds. Quantum Monte Carlo and Lanczos diagonalization results are discussed in this model. To reproduce experimental results on charge gap and Jahn-Teller distortions, we show that a synergy between the strong correlation effects and the Jahn-Teller coupling is import...

Oxyfluoride Chemistry of Layered Perovskite Compounds

In this paper, we review recent progress and new challenges in the area of oxyfluoride perovskite, especially layered systems including Ruddlesden-Popper (RP), Dion-Jacobson (DJ) and Aurivillius (AV) type perovskite families. It is difficult to synthesize oxyfluoride perovskite using a conventional solid-state reaction because of the high chemical stability of the simple fluoride starting mater...