Magnetoelectric excitations in hexaferrites utilizing solenoid coil for sensing applications

We have developed techniques for H- and E-field sensors utilizing single phase magnetoelectric hexaferrite materials in the frequency range of 100 Hz to 10 MHz. Novel excitation method incorporating solenoid coils and single and multi-capacitor banks were developed and tested for sensor detections. For H-field sensing we obtained sensitivity of about 3000 V/mG and for E-field sensing the sensitivity was 10−4 G/Vm−1. Tunability of about 0.1% was achieved for tunable inductor applications. However, the proposed designs lend themselves to significant (~106) improvements in sensitivity and tunability.