Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3292584
Keywords
calcium compounds; cobalt compounds; Curie temperature; dielectric polarisation; doping; ferroelectric materials; magnesium compounds; multiferroics
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Funding
- Natural Science Foundation of China [10874075, 50832002]
- National Key Projects for Basic Research of China [2009CB929501, 2009CB623303]
- Natural Science Foundation of China in Jiangsu [BK2008024]
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Polycrystalline Ca3-xMgxCo2-yMnyO6 (y similar to 1.0) samples are prepared in order to investigate the A-site doping effect of Ca3Co2-yMnyO6 (y similar to 1.0). Compared with Ca3Co2-yMnyO6 (y similar to 1.0), the ferroelectric polarization and Curie point of Ca3-xMgxCo2-yMnyO6 (y similar to 1.0) at the maximal doping x similar to 0.3 are significantly enhanced. The magnetic order of Ca3-xMgxCo2-yMnyO6 (x similar to 0.3, y similar to 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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