Magneto-electric coupling in multiferroic nanocomposites of the type x (Na_0.5K_0.5)_0.94Li_0.06NbO₃- (1−x) CoFe₂O₄: Role of ferrite phase

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• 作者：R. Rakhikrishna^a ; J. Isaac^a ; J. Philip^b ; ^{jphilip6012@gmail.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Sodium Potassium Lithium Niobate-Cobalt ferrite ; Magneto-electric effect ; Multiferroic composites ; AC conductivity ; Nickel ferrite
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：664-671
• 全文大小：1041 K

文摘

Lead free multiferroic nanocomposites of Sodium Potassium Lithium Niobate-Cobalt Ferrite xNKLN – (1-x) CFO with molar weight percentages x=0.70, 0.75, 0.80, 0.85 are prepared by solid-state reaction. Samples are characterized using powder XRD, FT-IR, TEM, and magnetic measurements. Piezoelectric properties of the samples are measured and analyzed. After poling, the dielectric properties show resonance/relaxation peaks at certain frequencies. Magneto-dielectric coefficients corresponding to dielectric constant and loss are reported. The magneto-electric coefficient of the material is measured following a dynamic measurement method. Maximum value of magneto-electric coefficient obtained is 0.0157 V/cm-Oe, which is good for a lead free sample prepared by this route, but lower than the corresponding nickel ferrite (NFO) based samples. The lower magneto-electric response of CFO based composites is explained as due the material being magnetically harder. Changes in physical properties with applied magnetic field make them promising for applications like eco-friendly sensors and actuators.