Text this: Electric field-induced strain response of lead-free Fe<inf>2</inf>O<inf>3</inf> nanoparticles-modified Bi<inf>0.5</inf>(Na<inf>0.80</inf>K<inf>0.20</inf>)<inf>0.5</inf>TiO<inf>3</inf>-0.03(Ba<inf>0.70</inf>Sr<inf>0.03</inf>)TiO<inf>3</inf> piezoelectric ceramics

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