Magnetic measurements on micrometer-sized samples under high pressure using designed NV centers.
Margarita Lesik1, Thomas Plisson2, Loïc Toraille1
1Laboratoire Aimé Cotton, CNRS, Univ. Paris-Sud, ENS Paris-Saclay, Université Paris-Saclay, 91405 Orsay Cedex, France.
Science (New York, N.Y.)
|December 14, 2019
Summary
We developed a new optical magnetometry technique using nitrogen-vacancy centers in diamond anvils. This method allows studying magnetic properties under extreme pressures, revealing iron
Area of Science:
- Condensed matter physics
- Materials science
- Quantum sensing
Background:
- Pressure profoundly influences material properties, including structural, electronic, and magnetic interactions.
- Studying magnetic properties of micro-samples under high pressure is challenging with conventional methods like diamond anvil cells.
Purpose of the Study:
- To introduce a novel method for spatially resolved optical magnetometry.
- To enable the study of magnetic phenomena in materials subjected to extreme pressures.
Main Methods:
- Utilizing a layer of nitrogen-vacancy (NV) centers on a diamond anvil surface for optical magnetometry.
- Performing measurements at room and low temperatures.
- Applying pressures up to 30 gigapascals.
Main Results:
- Observed the pressure-induced ferromagnetic collapse in an iron bead up to 30 GPa.
- Detected the superconducting transition of magnesium dibromide at 7 GPa.
- Demonstrated the capability of the NV-center-based method for high-pressure magnetic studies.
Conclusions:
- The developed optical magnetometry technique provides a powerful tool for investigating material properties under high pressure.
- This method opens new avenues for exploring pressure-dependent magnetism and superconductivity in diverse materials.
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