Systems and methods for multi-ferroic tunable acoustically driven magnetic resonance sensors

A tunable acoustically driven ferromagnetic resonance (ADFMR) sensor apparatus, the apparatus comprising:

• a piezoelectric substrate;
• at least one input acoustic transducer on the piezoelectric substrate and configured to activate the piezoelectric substrate to generate an acoustic wave;
• a magnetostrictive material on the piezoelectric substrate and configured to receive and absorb the acoustic wave based on a ferromagnetic resonance of the magnetostrictive material;
• at least one output acoustic transducer on the piezoelectric substrate;
• and
• a tuning electrical contact configured to apply energy to alter the ferromagnetic resonance of the magnetostrictive material by modulating strain on the magnetostrictive material.

A method for tuning an acoustically-driven ferromagnetic resonance (ADFMR) magnetic field sensor, the method comprising:

• activating the ADFMR magnetic field sensor by applying an activation voltage to an input acoustic transducer on a piezoelectric substrate to generate an acoustic wave that is received and absorbed by a magnostrictive material on the piezoelectric substrate based on a ferromagnetic resonance of the magnostrictive material;
• and
• applying a tuning voltage to a tuning electrical contact in electrical communication with the ADFMR magnetic field sensor to tune the ADFMR magnetic field sensor while the activation voltage is applied;
• and
• sensing a magnetic field based on an output from an output acoustic transducer on the piezoelectric substrate.