High magnetoelectric effect in laminated composites of giant magnetostrictive alloy and lead-free piezoelectric ceramic

Yanmin Jia, Siu Wing Or, Jie Wang, Helen Lai Wa Chan, Xiangyong Zhao, Haosu Luo

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Magnetoelectric (ME) laminated composites with all phases environmentally friendly were prepared by sandwiching one layer of thickness-polarized (Bi12 Na12) TiO3 - (Bi12 K12) TiO3 -BaTiO3 lead-free piezoelectric ceramic disk between two layers of thickness-magnetized Tb0.3 Dy0.7 Fe1.92 giant magnetostrictive alloy disk along the thickness direction. The composites exhibited the maximum ME voltage coefficient of 40.7 mV/Oe with a flat response in the measured frequency range of 0.1-20 kHz under a dc magnetic bias of 5 kOe. The induced ME voltage showed an extremely linear relationship to the applied ac magnetic field with amplitude varying from 3× 10-5 to 10 Oe over a broad range of dc magnetic bias of 0-5.5 kOe. The high ME effect was analyzed and found to be comparable to most major lead-based ME composites. The present study opens up possibilities for developing green ME devices.
Original languageEnglish
Article number104103
JournalJournal of Applied Physics
Issue number10
Publication statusPublished - 12 Jun 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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