Investigation on a new Fe ₈₃ Ga ₁₇ wire–based magnetoelastic resonance biosensor

Iron–gallium alloy, as an emerging class of magnetoelastic material, has attracted a great deal of attention due to its excellent mechanical and magnetostriction properties. This article proposes a magnetoelastic biosensor involving the Fe ₈₃ Ga ₁₇ wire. The resonant frequency and S ₁₁ magnitude responses for the different length Fe ₈₃ Ga ₁₇ wires were tested. Furthermore, the response characteristics were improved by optimizing the coil parameters, for example, wire diameter, turn number, and tube diameter. In addition, the annealing treatment to the Fe ₈₃ Ga ₁₇ can also enhance the response characteristics. Finally, the Fe ₈₃ Ga ₁₇ wire–based biosensor was used to measure the ethanol concentration and has good linearity.