Enhanced ferromagnetism and ferroelectricity in multiferroic CuCr1-xNixO2

Luo, Shijun; Wang, K. F.; Li, S. Z.; Dong, X. W.; Yan, Z. B.; Cai, H. L.; Liu, J.-M.
April 2009
Applied Physics Letters;4/27/2009, Vol. 94 Issue 17, p172504
Academic Journal
Polycrystalline CuCr1-xNixO2 is synthesized and its multiferrocity is characterized in order to enhance the ferromagnetism and ferroelectricity of CuCrO2-based multiferroics. At the optimized doping level x=0.05, we observe not only an enhancement of one order of magnitude in magnetization but also a remarkable increasing of polarization up to ∼50 μC/m2 from ∼35 μC/m2 of polycrystalline CuCrO2. It is argued that the Ni-doping may modulate the antiferromagnetic interactions between Cr3+ ions and probably induce the conical-like spin component responsible for the enhanced ferromagnetism.


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