Magnetoimpedance (MI) effect refers to a large impedance change of a
ferromagnetic material upon the application of an external magnetic field.
sensors can provide outstanding sensitivity, but they require high freuqency
measurements, making their operation more complex than magnetoresistive or Hall
the other hand, MI sensors are very simple in structure, easy to fabricate and
robust, and the high frequency operation can be exploited for wireless sensing.
objective of this project is to explore the potential advantages of the MI
effect to extend the scope of MI sensors to advanced applications such as
flexible magnetic sensors, passive wireless magnetic sensors, multifunctional
flexible MI sensor and its impedance (Z) characteristic as a function of the
bending radius (R).A
passive wireless magnetic field sensor fabricated on a piezoelectric lithium
niobate substrate. The device consists of a surface acoustic wave transponder
with a receiver and reflector interdigital transducer (IDT). The reflector IDT
is loades with an MI sensor.
passive wireless multifunctional sensor for measuring temperature, humidity and
magnetic field fabricated on a piezoelectric lithium niobate substrate. The
device consists of a surface acoustic wave transponder with two receiver and
several reflector interdigital transducers (IDT).