A novel constant-force scanning probe incorporating mechanical-magnetic coupled structures

Area of Science:

• Physics
• Mechanical Engineering
• Materials Science

Background:

• Developing scanning probes with constant measuring force is crucial for high-resolution surface analysis.
• Existing designs often face challenges in maintaining consistent force due to complex mechanisms or environmental factors.

Purpose of the Study:

• To design and fabricate a one-dimensional scanning probe utilizing negative stiffness for constant measuring force.
• To establish an analytical model for predicting the probe's behavior under multi-force conditions.

Main Methods:

• Utilized a magnetic coupled structure, parallel guidance mechanism, and pre-stressed spring.
• Developed an analytical model based on material mechanics and an equivalent surface current model for magnetic force calculation.
• Performed numerical simulations and experimental validation.

Main Results:

• Successfully designed and fabricated a scanning probe with constant measuring force capabilities.
• Established a nonlinear relationship between measuring force and probe displacement.
• Validated the practicability of the magnetic coupled structure through consistent simulation and experimental results.

Conclusions:

• The magnetic coupled structure is a viable approach for achieving constant measuring force in scanning probes.
• The developed analytical model accurately predicts the probe's performance.
• This technology has potential applications in advanced surface characterization techniques.