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High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements

Published on: May 12, 2023

A high-bandwidth spintronic position sensor.

Tomas Tuma¹, Angeliki Pantazi, Deepak R Sahoo

¹IBM Research-Zurich, Säumerstrasse 4, 8803 Rüschlikon, Switzerland. Automatic Control Laboratory, Swiss Federal Institute of Technology, Physikstrasse 3, 8092 Zurich, Switzerland.

|August 23, 2014

Summary

This summary is machine-generated.

This study introduces a novel spintronic sensor for non-contact, non-optical position sensing. It achieves atomic-scale resolution, offering a breakthrough for nanoscale science and high-speed atomic force microscopy.

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Area of Science:

Nanotechnology
Materials Science
Physics

Background:

High-resolution position sensing is crucial for nanoscale science and engineering.
Current non-contact sensing methods are primarily optical, limiting bandwidth and application scope.
Atomic-scale resolution is a key challenge in advanced metrology.

Purpose of the Study:

To develop a novel non-contact, non-optical position-sensing technology.
To achieve atomic-scale resolution in position measurements.
To demonstrate the sensor's utility in high-speed closed-loop control systems.

Main Methods:

Utilizing spintronic sensors to detect magnetic field gradients.
Employing a microscale magnetic dipole as the target for sensing.
Implementing the sensor for closed-loop feedback in atomic force microscopy.

Main Results:

Achieved a sensitivity of up to 40 Ω/μm.
Demonstrated a linear sensing range exceeding 10 μm.
Recorded a noise floor as low as 0.5 pm/√[Hz].

Conclusions:

The developed spintronic sensor offers a viable non-optical alternative for high-resolution position sensing.
The technology enables non-contact measurements with atomic-scale precision.
The sensor facilitates high-speed atomic force microscopy with frame rates over 1 frame/s.