Enhanced multiferroicity in Mg-doped Ca3Co2-xMnxO6

Li, L.; Luo, W. Z.; Guo, Y. J.; Li, S. Z.; Luo, S. J.; Wang, K. F.; Liu, J.-M.
January 2010
Applied Physics Letters;1/11/2010, Vol. 96 Issue 2, p022516
Academic Journal
Polycrystalline Ca3-xMgxCo2-yMnyO6 (y∼1.0) samples are prepared in order to investigate the A-site doping effect of Ca3Co2-yMnyO6 (y∼1.0). Compared with Ca3Co2-yMnyO6 (y∼1.0), the ferroelectric polarization and Curie point of Ca3-xMgxCo2-yMnyO6 (y∼1.0) at the maximal doping x∼0.3 are significantly enhanced. The magnetic order of Ca3-xMgxCo2-yMnyO6 (x∼0.3, y∼1.0) and thus ferroelectric order are more robust than the undoped compound. The slight lattice shrinking as a result of Mg substitution may contribute to the enhancement of exchange striction, leading to the changes in magnetic and ferroelectric properties.


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