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A convenient and robust design for diamond-based scanning probe microscopes.

Zhousheng Chen^1,2,3, Zhe Ding^1,4, Mengqi Wang^1,2

¹CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China.

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|November 10, 2023

Summary

We designed a versatile scanning probe microscope using nitrogen-vacancy centers in diamond for sensitive magnetic sensing. This robust instrument operates across wide temperature and vacuum ranges, enabling advanced nanomagnetism and spintronics research.

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Area of Science:

Condensed matter physics
Quantum sensing

Background:

Nitrogen-vacancy (NV) centers in diamond are highly sensitive magnetic field sensors.
NV-center-based microscopy offers potential for nanoscale magnetic imaging.

Purpose of the Study:

To design a robust and versatile scanning probe microscope utilizing NV centers in diamond.
To enable magnetic sensing under diverse experimental conditions, including variable temperatures and high vacuum.

Main Methods:

Development of a compact scanning head and vacuum chamber system for NV-center microscopy.
Integration of NV centers for magnetic field detection within the microscope design.
Testing and validation of the system's performance across a temperature range of 20-500 K and vacuum down to 1 × 10-7 mbar.

Main Results:

Demonstrated reliable operation of the NV-center scanning probe microscope.
Showcased temperature control performance and system stability.
Acquired confocal images of graphene, diamond probes, ferromagnetic strips, and BiFeO3 films, validating imaging capabilities.

Conclusions:

The designed NV-center scanning probe microscope is reliable and versatile.
The instrument is suitable for various experimental conditions, extending applications in nanomagnetism and spintronics.
This work provides a method and design for advanced nanoscale magnetic imaging.