Journal
MATERIALS
Volume 4, Issue 1, Pages 153-168Publisher
MDPI
DOI: 10.3390/ma4010153
Keywords
double-perovskite structure; ferromagnetic and ferroelectric properties; high-pressure synthesized bulk; epitaxially grown thin film; artificial superlattice
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Funding
- International Center for Integrated Research and Advanced Education in Materials Science [B-09]
- Chemical Synthesis Core Research Institutions from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan
- [19GS0207]
- [18350097]
- [17105002]
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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.
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