Megabar pressure sensing and magnetic phase imaging by [111]-oriented nitrogen-vacancy centers in diamond

At a Glance

Metadata	Details
Publication Date	2025-07-22
Journal	Journal of Applied Physics
Authors	Di Mai, Cheng Zhong, Ziqi Wang, He Wang, Xiaoyu Sun
Institutions	University of Science and Technology of China

Abstract

High-precision pressure-magnetic field dual-mode detection under megabar pressures is achieved through a nitrogen vacancy (NV) quantum sensor integrated on a (111)-oriented diamond anvil culet. Experimental measurements reveal a linear pressure dependence of the NV center’s zero-field splitting parameter D, demonstrating a characteristic slope of 7.94(4) MHz/GPa. This fundamental relationship enables the development of nonhydrostatic pressure sensing technology capable of operation up to 140 GPa without requiring traditional pressure-calibration media. In situ ferromagnetic/paramagnetic phase transition experiments on iron demonstrate the NV sensor’s capability for submicrometer-scale pressure distribution imaging (spatial resolution of ∼500 nm) and magnetic field detection. Visualization of magnetic phase transition boundaries induced by pressure gradients confirms the sensor’s ability to probe submicrometer-scale magnetism under extreme conditions. This method breaks through the limitations of traditional pressure gauges in nonhydrostatic conditions and provides a universal tool with high sensitivity and spatial resolution for research on high-pressure superconductivity, magnetic phase transitions, and quantum materials.

Tech Support

Original Source

DOI: https://doi.org/10.1063/5.0278258

References

2018 - Solids, liquids, and gases under high pressure [Crossref]
2020 - Synchrotron infrared spectroscopic evidence of the probable transition to metal hydrogen [Crossref]
2015 - Conventional superconductivity at 203 kelvin at high pressures in the sulfur hydride system [Crossref]
2024 - Tunneling spectroscopy at megabar pressures: Determination of the superconducting gap in sulfur [Crossref]
2019 - Evidence for superconductivity above 260 K in lanthanum superhydride at megabar pressures [Crossref]
2021 - High-temperature superconducting phases in cerium superhydride with a TC up to 115 K below a pressure of 1 megabar [Crossref]
2018 - Magnetic criticality enhanced hybrid nanodiamond thermometer under ambient conditions [Crossref]
2020 - Wide-field magnetic field and temperature imaging using nanoscale quantum sensors [Crossref]
2017 - Temperature dependent energy gap shifts of single color center in diamond based on modified Varshni equation [Crossref]
2014 - Electronic properties and metrology applications of the diamond NV− center under pressure [Crossref]