Self-Assembled On-Chip-Integrated Giant Magneto-Impedance Sensorics

Area of Science:

• Materials Science and Engineering
• Sensor Technology
• Biomedical Engineering

Background:

• Giant magneto-impedance (GMI) sensors offer high sensitivity for magnetic field detection.
• Current GMI sensor fabrication methods face challenges in achieving optimal performance and integration.
• Magnetoencephalography (MEG) requires highly sensitive, non-invasive magnetic field sensors.

Purpose of the Study:

• To introduce a novel strain engineering method for fabricating on-chip-integrated GMI sensors.
• To develop a 3D sensor architecture for enhanced magnetic domain stabilization.
• To lay the groundwork for CMOS-compatible GMI sensorics for magnetoencephalography.

Main Methods:

• Utilizing strain engineering to manipulate material properties.
• Designing a geometrical transformation from a planar to a tubular 3D architecture.
• Integrating pick-up coils with GMI sensor arrays on-chip.

Main Results:

• Successful realization of arrays of on-chip-integrated GMI sensors.
• Stabilization of favorable azimuthal magnetic domain patterns through 3D architecture.
• Demonstration of a novel fabrication approach for advanced sensorics.

Conclusions:

• The developed strain engineering method provides a robust foundation for GMI sensor fabrication.
• The 3D tubular architecture is effective in stabilizing magnetic domain patterns.
• This work paves the way for CMOS-compatible GMI sensors in magnetoencephalography.