Abstract:
A magnetic gradiometer can be used in systems or methods for nondestructive testing, even when the material being tested is weakly magnetic. The magnetic gradiometer can include a printed circuit board (PCB) comprising a first end and a second end separated by a base length; an excitation coil encircling at least a portion of the PCB and configured to deliver an alternating current (AC) to generate an excitation magnetic field; and a differential sensor. The differential sensor can include a reference magnetic tunneling junction in magnetic vortex state (vortex MTJ) sensor array at the first end to generate a voltage based on the excitation magnetic field; and a signal vortex MTJ sensor array at the second end to generate another voltage based on the excitation magnetic field due to a composition of the measurement target. The second end of the PCB can be oriented towards the measurement target.
Abstract:
Embodiments of the present disclosure provide for materials that include conch shell structures, methods of making conch shell slices, devices for storing energy, and the like.
Abstract:
Embodiments of the present disclosure provide for materials that include conch shell structures, methods of making conch shell slices, devices for storing energy, and the like.
Abstract:
Embodiments of the present disclosure provide for materials that include conch shell structures, methods of making conch shell slices, devices for storing energy, and the like.
Abstract:
A magnetic gradiometer can be used in systems or methods for nondestructive testing, even when the material being tested is weakly magnetic. The magnetic gradiometer can include a printed circuit board (PCB) comprising a first end and a second end separated by a base length; an excitation coil encircling at least a portion of the PCB and configured to deliver an alternating current (AC) to generate an excitation magnetic field; and a differential sensor. The differential sensor can include a reference magnetic tunneling junction in magnetic vortex state (vortex MTJ) sensor array at the first end to generate a voltage based on the excitation magnetic field; and a signal vortex MTJ sensor array at the second end to generate another voltage based on the excitation magnetic field due to a composition of the measurement target. The second end of the PCB can be oriented towards the measurement target.
Abstract:
Embodiments of the present disclosure provide for materials that include conch shell structures, methods of making conch shell slices, devices for storing energy, and the like.