Shelton David P, Cabriales Waldo, Salamat Ashkan
Department of Physics and Astronomy, University of Nevada, Las Vegas, Nevada 89154-4002, USA.
Rev Sci Instrum. 2024 Aug 1;95(8). doi: 10.1063/5.0216877.
The emerging field of optical magnetometry utilizing negative-charged nitrogen vacancy (NV-) centers provides a highly sensitive lab bench technique for spatially resolved physical property measurements. Their implementation in high pressure diamond anvil cell (DAC) environments will become common as other techniques are often limited due to the spatial constraints of the sample chamber. Apparatus and techniques are described here permitting for more general use of magnetic field measurements inside a DAC using continuous wave optical detected magnetic resonance in NV- centers in a layer of nanodiamonds. A microstrip antenna delivers a uniform microwave field to the DAC and is compatible with simple metal gaskets, and the sensor layer of deposited nanodiamonds allows for simple determination of the magnetic field magnitude for B in the 1-100 G range. The ferromagnetic transition in iron at 18 GPa is measured with the apparatus, along with its hysteretic response.
利用带负电荷的氮空位（NV-）中心的新兴光磁测量领域，为空间分辨物理性质测量提供了一种高度灵敏的实验室台式技术。随着其他技术常常因样品腔的空间限制而受到制约，它们在高压金刚石对顶砧（DAC）环境中的应用将变得普遍。本文描述了一些装置和技术，这些装置和技术允许在DAC内部更广泛地使用磁场测量，该测量采用连续波光探测磁共振技术，对一层纳米金刚石中的NV-中心进行测量。一个微带天线向DAC提供均匀的微波场，并且与简单的金属垫片兼容，而沉积的纳米金刚石传感层允许简单地确定1-100 G范围内B的磁场强度。用该装置测量了铁在18 GPa时的铁磁转变及其滞后响应。
