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Dalton Trans. 2013 Jul 28;42(28):10116-20. doi: 10.1039/c3dt50489a.

Frustration relieved ferrimagnetism in novel A- and B-site-ordered quadruple perovskite.

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  • 1Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.


A novel A- and B-site-ordered quadruple perovskite CaCu3Fe2Sb2O12 was obtained and it shows ferrimagnetism below about 170 K. The B-site Fe spin sublattice adapts a tetrahedral framework in a cubic structure and the Fe(3+)-Fe(3+) antiferromagnetic interaction can result in a geometrical spin frustration as seen in a simple perovskite Ca2FeSbO6. With the introduction of Cu(2+) into the A' site, the antiferromagnetic spin frustration is relieved by the strong Cu(2+)-Fe(3+) interaction, and a ferrimagnetic ordering appears at a much higher temperature than the spin-glass transition temperature.

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