Design and analysis of magnetostrictive sensors for wireless temperature sensing

Magnetostrictive transducers are commonly used as actuators and sonar transducers, in remote non-destructive evaluation. Their use wireless thermometry is relatively unexplored. Since magnetostriction-based sensors passive, they could potentially enable long-term near-field thermometry. While the temperature sensitivity of resonance frequency magnetostrictive has been reported previous studies, origin has, however, not elucidated. Here, we identify material properties that determine ways to improve well detection technique. Using a combination analytical computational methods, systematically directly influence coefficient (TCF). We first experimentally measure shift due changes Metglas strip be 0.03% K−1. insights from theory, then demonstrate fivefold improvement TCF by using Terfenol place sensor material. further an alternate sensing technique does require measuring frequency, consequently reducing instrument complexity. This work provides general framework analyze materials scheme for