Magnetometry in a diamond anvil cell using nitrogen vacancy centers in a nanodiamond ensemble
David P Shelton1, Waldo Cabriales1, Ashkan Salamat1
1Department of Physics and Astronomy, University of Nevada, Las Vegas, Nevada 89154-4002, USA.
The Review of Scientific Instruments
|August 1, 2024
Summary
Optical magnetometry using nitrogen vacancy (NV-) centers enables precise magnetic field measurements within diamond anvil cells (DACs). This technique successfully measured iron
Area of Science:
- Physics
- Materials Science
- Quantum Sensing
Background:
- Optical magnetometry with nitrogen vacancy (NV-) centers offers sensitive, spatially resolved measurements.
- Diamond anvil cells (DACs) present spatial constraints limiting traditional measurement techniques.
- Integrating NV- centers into DACs is crucial for high-pressure research.
Purpose of the Study:
- To develop and demonstrate a general method for magnetic field measurements inside DACs using NV- centers.
- To enable spatially resolved physical property measurements in extreme environments.
Main Methods:
- Utilized continuous wave optical detected magnetic resonance in NV- centers within a nanodiamond layer.
- Employed a microstrip antenna for uniform microwave field delivery within the DAC.
- Integrated the sensor layer with standard metal gaskets for compatibility.
Main Results:
- Achieved magnetic field measurements in the 1-100 G range.
- Successfully measured the ferromagnetic transition in iron at 18 GPa.
- Characterized the hysteretic response of iron's magnetic transition.
Conclusions:
- The described apparatus and techniques facilitate general magnetic field measurements in DACs.
- This method enhances the utility of NV- centers for high-pressure condensed matter physics.
- The technique is suitable for studying magnetic phase transitions under extreme conditions.
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