High-performance vibration power generation using polycrystalline Fe–Co-based alloy due to large inverse magnetostrictive effect

The magnetic flux density change ΔB caused by the inverse magnetostrictive effect is key for achieving high-performance vibration power generation. As magnetization curve of polycrystalline Fe–47.6 at. % Co–2.3 V (Fe–Co–V) alloy became easier to magnetize applying tensile stresses, value estimated from curves depended significantly on fields. Hence, generation a U-shaped unimorph device using Fe–Co–V core was demonstrated under various bias result field adjustment, open-circuit voltage induced improved ∼7.0 V. Such superior performance attributable large 1.1 T in core. Therefore, adjustment fields essential obtaining alloys, which are promising materials