A scanning probe microscope for magnetoresistive cantilevers utilizing a nested scanner design for large-area scans

Area of Science:

• Nanotechnology
• Surface Science
• Microscopy

Background:

• Atomic Force Microscopy (AFM) is a powerful tool for surface characterization.
• Self-sensing tunneling magnetoresistive (TMR) cantilevers offer advanced sensing capabilities.
• Characterizing TMR sensors requires specialized instrumentation for high-resolution imaging and deflection measurement.

Purpose of the Study:

• To develop and characterize an AFM system specifically for self-sensing TMR cantilevers.
• To demonstrate the capability of a nested scanner design for large-area, high-resolution scanning.
• To validate the performance of self-sensing TMR cantilevers as deflection sensors within the developed AFM.

Main Methods:

• Utilized a nested scanner design combining a high-resolution (5 × 5 × 5 μm³) scanner with a large-area (800 × 800 × 35 μm³) scanner.
• Integrated a laser beam deflection setup for independent measurement of cantilever deflection.
• Employed a commercial AFM controller for instrument operation and data acquisition.

Main Results:

• Achieved a large scan range (800 × 800 × 35 μm³) without image stitching.
• Demonstrated high stability of the nested scanner design.
• Successfully characterized self-sensing TMR cantilevers, showcasing their performance as deflection sensors.

Conclusions:

• The developed AFM system effectively characterizes self-sensing TMR cantilevers.
• The nested scanner design enables stable, large-area scanning with high resolution.
• Self-sensing TMR cantilevers exhibit promising performance for AFM applications.