News Column

New Findings from Nanjing University in Ceramics Provides New Insights

June 24, 2014

By a News Reporter-Staff News Editor at Journal of Technology -- Investigators publish new report on Ceramics. According to news originating from Jiangsu, People's Republic of China, by VerticalNews correspondents, research stated, "Graded particulate composite films in which ferromagnetic CoFe2O4 nanoparticles are gradedly distributed in the ferroelectric Pb(Zr0.52Ti0.48)O-3 matrix along the thickness direction have been prepared on Pt/Ti/SiO2/Si wafers via sol-gel spin-coating method and rapid annealing process. Compared with the homogenous films, the graded ones not only exhibited magnetic anisotropy, but also showed evident increase in both ferroelectric polarization and dielectric tunability."

Our news journalists obtained a quote from the research from Nanjing University, "Moreover, great enhancement of magnetodielectric effect was observed in such graded films. We elucidated the origin of enhanced magnetodielectric coupling and attributed it to the combined influence of two factors, that is, the enhanced ferroelectric polarization caused by CoFe2O4 distribution gradient and flexoelectric polarization induced by strain gradient under external magnetic field."

According to the news editors, the research concluded: "This work presents a feasible way to modulate the magnetoelectric coupling in ferromagnetic-ferroelectric composite films for developing high-performance multiferroic materials at nanoscale."

For more information on this research see: Enhanced Magnetodielectric Effect in Graded CoFe2O4/Pb(Zr0.52Ti0.48)O-3 Particulate Composite Films. Journal of the American Ceramic Society, 2014;97(5):1450-1455. Journal of the American Ceramic Society can be contacted at: Wiley-Blackwell, 111 River St, Hoboken 07030-5774, NJ, USA. (Wiley-Blackwell -; Journal of the American Ceramic Society -

The news correspondents report that additional information may be obtained from B. Chen, Nanjing University, Dept. of Phys, Nanjing 210093, Jiangsu, People's Republic of China. Additional authors for this research include J.Y. Wang, M.X. Zhou, J.G. Wan and J.M. Liu.

Keywords for this news article include: Asia, Jiangsu, Ceramics, People's Republic of China

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Source: Journal of Technology

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