Substantial magnetoelectric response in 2/3[Pb(Mg1/3Nb2/3)O3]−1/3[PbTiO3]-CoFe2O4 composites

• Published in: Journal of alloys and compounds 2021-05, Vol.863, p.158504, Article 158504
• Main Authors: Channagoudra, Ganesha, Saw, Ajay Kumar, Dey, Koushik, Xavier, Deepa, Venkatesh, R., Subramanian, V., Shukla, D.K., Dayal, Vijaylakshmi
• Format: Article
• Language: English
• Subjects: Leakage current; Magnetoelectric coefficient; Magnetostriction; Multiferroics; Particulate composite; Resonant frequency
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2020.158504

•Magnetoelectric effect in (1-x)PMN-PT:xCFO composites with x = 10%, 15%, 20% and 30% molar fraction have been studied.•The composite in 80:20 ratio have the αME ~ 4.30 mV/cm Oe at 1 kHz and 300 K.•At 286 kHz (resonance frequency) the αME value of 80:20 is found to be 7 times larger than at off-resonance value.•The enhanced ME responses in 80:20 composite, makes it a potential candidate for magnetic field sensors and energy harvesters. Particulate type multiferroic composites, which exhibit coupling between piezoelectric and magnetostrictive phases via strain, have a wide range of industrial applications. We have investigated the structural, electrical, magnetic, morphological properties and magnetoelectric (ME) along with magnetodielectric (MD) responses of (1-x){2/3[Pb(Mg1/3Nb2/3)O3]−1/3[PbTiO3]}:x[CoFe2O4], (1-x)[PMN-PT]-x[CFO] composites with x = 10%, 15%, 20% and 30% in molar ratios. The composite with 80:20 ratio is found to exhibit the highest magnetoelectric coefficient (αME) ~ 4.30 mV/cm Oe (at 1 kHz, 300 K), and the value of αME further increases with increasing frequency, reaches up to a value as large as seven times of this off-resonance value, at a resonance frequency of 286 kHz. The MD response of this composite reaches a maximum ~ 0.28%, at ~ 1.5 T. The substantial ME & MD responses in this 80:20 composite makes it a viable candidate for its use in magnetic field sensors and energy harvesters.