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Multiferroic Compounds with Double-Perovskite Structures

Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
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Materials 2011, 4(1), 153-168; https://doi.org/10.3390/ma4010153
Received: 25 November 2010 / Revised: 27 December 2010 / Accepted: 6 January 2011 / Published: 7 January 2011
New multiferroic compounds with double-perovskite structures were synthesized. Bi2NiMnO6 was synthesized in bulk form by high-pressure synthesis and also in a thin-film form by epitaxial growth. The material showed both ferromagnetic and ferroelectric properties, i.e., the multiferroic property at low temperature. Bi2FeCrO6 was also fabricated in a (1 1 1) oriented BiFeO3/BiCrO3 artificial superlattice, with a 1/1 stacking period. The superlattice film showed ferromagnetic behavior and polarization switching at room temperature. In the compounds, Bi3+ ion, located at the A site in the perovskite structure, caused ferroelectric structural distortion, and the B-site ordering of the Ni2+ and Mn4+ ions (Fe3+ and Cr3+ ions) in a rock-salt configuration led to ferromagnetism according to the Kanamori-Goodenough rule. View Full-Text
Keywords: double-perovskite structure; ferromagnetic and ferroelectric properties; high-pressure synthesized bulk; epitaxially grown thin film; artificial superlattice double-perovskite structure; ferromagnetic and ferroelectric properties; high-pressure synthesized bulk; epitaxially grown thin film; artificial superlattice
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Shimakawa, Y.; Azuma, M.; Ichikawa, N. Multiferroic Compounds with Double-Perovskite Structures. Materials 2011, 4, 153-168.

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