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2011 ; 4
(1
): 153-168
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Multiferroic Compounds with Double-Perovskite Structures
#MMPMID28879983
Shimakawa Y
; Azuma M
; Ichikawa N
Materials (Basel)
2011[Jan]; 4
(1
): 153-168
PMID28879983
show ga
New multiferroic compounds with double-perovskite structures were synthesized.
Bi?NiMnO? 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.
Bi?FeCrO? was also fabricated in a (1 1 1) oriented BiFeO?/BiCrO? artificial
superlattice, with a 1/1 stacking period. The superlattice film showed
ferromagnetic behavior and polarization switching at room temperature. In the
compounds, Bi(3+) ion, located at the A site in the perovskite structure, caused
ferroelectric structural distortion, and the B-site ordering of the Ni(2+) and
Mn(4+) ions (Fe(3+) and Cr(3+) ions) in a rock-salt configuration led to
ferromagnetism according to the Kanamori-Goodenough rule.