What is it about?

It has been increasingly difficult to conduct low temperature SPM experiments due to the severe shortage of helium. We report a cryogen-free SPM system operating at a base temperature near 5 K with high-resolution measurement capabilities similar to liquid-helium-based SPM systems.

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Why is it important?

Our results show that both the base temperature and the data quality from our cryogen-free SPM system are comparable to conventional liquid-helium-based SPM systems. In addition, without the need for cryogen refills, our SPM system enables uninterrupted low-temperature measurements.


Replacing conventional liquid-helium based SPM systems with cryogen-free systems is not unrealistic anymore and will be extended to more complicated SPM systems in the near future.

Katsuya Iwaya

Read the Original

This page is a summary of: Development of a near-5-Kelvin, cryogen-free, pulse-tube refrigerator-based scanning probe microscope, Review of Scientific Instruments, April 2022, American Institute of Physics,
DOI: 10.1063/5.0084888.
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