Effect of load resistance on magnetoelectric properties in FeGa/BaTiO3/FeGa laminate composites

The electrical resistance load effects on an ME laminated composite of FeGa/BaTiO3/FeGa are investigated. The results show that (i) The ME voltage coefficient increases and tends to be saturated with the increase in electrical resistance load, (ii) the cutoff frequency and the resonance frequency both shift to the lower frequency side and approach to the values under open-circuit condition with the increase in electrical resistance load, and (iii) the ME output power can be adjustable by changing the attached electrical resistance load to achieve the best active status. The present study provides the basis for the design of ME sensors and their electronic circuits.

► ME composites have been fabricated by sandwiching a BaTiO3 laminate between two FeGa laminates.
► The effect of electrical resistance load (RL) on the ME coupling of the laminated composite is investigated.
► The ME voltage coefficient increases and tends to be saturated with the increase in RL.
► The cutoff frequency and the resonance frequency reach the minimum values under open-circuit condition.
► The ME output power can be adjustable by changing the RL to achieve the best active status.