Improved magnetoelectric coupling in Mn and Zn doped CoFe2O4–PbZr0.52Ti0.48O3 particulate composite

In this letter, Mn and Zn simultaneously substituted CoFe2O4, Co0.6Zn0.4Fe1.7Mn0.3O4 has been proposed as magnetostrictive component having the maximum in plane piezomagnetic coupling coefficient (q11+q12∼0.070 ppm/Oe) at a field of H∼300 Oe with appreciable saturation values of longitudinal and transverse magnetostriction coefficients (λ11∼−20 ppm and λ12∼10 ppm). On incorporating this in composite (i.e., (x) PbZr0.52Ti0.48O3−(1−x) Co0.6Zn0.4Fe1.7Mn0.3O4) preparation, maximum magnetoelectric voltage coefficients (αE∼122 mV/cm Oe) was obtained in sample x=0.90 at ac magnetic field of amplitude ∼1 Oe and frequency ∼1 kHz.

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