Negative magnetostrictive paper formed by dispersing CoFe2O4 particles in cellulose nanofibrils

Abstract

Polymers are often combined with magnetostrictive materials to enhance their toughness. This study reports a cellulose nanofibril (CNF)-based composite paper containing dispersed CoFe2O4 particles (CNF–CoFe2O4). Besides imparting magnetization and magnetostriction, the incorporation of CoFe2O4 particles decreased the ultimate tensile strength and increased the fracture elongation of the CNF–CoFe2O4 composite paper. CNF was responsible for the tensile properties of CNF–CoFe2O4 composite paper. Consequently, the magnetic and magnetostrictive properties and tensile properties of CNF–CoFe2O4 composite paper can be controlled by changing the mixture ratio of CNF and CoFe2O4 particles.

Direct and converse piezoelectricity of thickness tuned BCZT ceramics: toward efficient bilayered magnetoelectric devices

“…The phase purity, dense microstructure, and elemental purity of the used magnetostrictive CFBO layer is shown in figures S6-S8 (supplementary material), respectively. CFBO exhibits very high value of magnetostriction (λ) (figure 6(a)) and piezomagnetic coefficient (figure 6(b)) with absolute values ∼ 256 ppm and 0.33 ppm/Oe, respectively [17,21,22]. As shown in figure 6(c), the value of ME coupling coefficient (a ME ) increases gradually with reducing the thickness of the piezoelectric BCZT layer.…”