Recently, a research team from the School of Communication and Information Engineering at SPS has made a major breakthrough in the development of a diamond NV color-centered quantum magnetometerTheThe team realized quantum precision measurements in the 0.01 T- 1.5 T magnetic field range for the first time using a diamond NV color-centered solid-state quantum system.Diamond NV Color Center Quantum Magnetometer
Diamond NV (nitrogen vacancy) color-centered quantum magnetometer is an ultra-precise measurement tool, a precision ruler of magnetic field strength, has been widely used in high-end magnetic materials, integrated circuit testing, medical imaging equipment development and physical quantity measurement, new energy carbon measurement and other fields, there are already Huawei, Hesi, ZTE, the State Grid, China Steel Research, metrology institutions and other Enterprise application.
The innovation of diamond NV color-centered quantum magnetometer has the significant advantages of high spatial resolution and wide range, which has important application value in the frontier application fields of industrial magnetic measurement, medical imaging equipment research and development, and integrated circuit testing.This innovation marks a solid step in the field of quantum magnetic measurement in China, which helps flatten magnetic field measurement in the era of quantization of measurement and is expected to provide more convenient services for advanced manufacturing industriesTheThis technology provides a common support technology for the quantitative micro-measurement and analysis of high-end permanent magnets, which is of great significance to enhance the R&D and manufacturing capability of high-end magnetic materials in China.
It is worth mentioning that the School of Communication and Information Engineering of Nanjing University of Posts and Telecommunications (NUPT), in the 14th Challenge Cup College Students' Innovation and Entrepreneurship Program Competition in Jiangsu Province Selection Competition.After a fierce competition, three projects stood out among 319 entries and won the Gold Award of the event.
Diamond NV color-centered quantum magnetometer calibration site plan
China Academy of Metrology and Science is one of the authoritative metrology organizations in China, which has wide influence in the metrology industry. The diamond NV color-centered quantum magnetometer strictly follows the JJF1832-2020 calibration specification for magnetometers, and has been strictly calibrated by the China Academy of Metrology and Science to ensure the accuracy of the measurement results. After calibrated by PT2025, the magnetometer's accuracy is better than 13 ppm in the range of 1.0-1.5T.This level of accuracy, reported for the first time internationally, is comparable to the Metrolab PT series of NMR magnetometers, the gold standard in magnetic field metrology.Unlike the PT series of MRI magnetometers, which require the replacement of three different ranges of probes in the 0.05 T to 1.5 T range, the Diamond NV Color Core Quantum Magnetometer is capable of covering a continuous magnetic field range of 0.01 T to 1.5 T with a single probe, which greatly simplifies the measurement process and improves the efficiency, and extends the range of MRI magnetometer measurements.
The spatial resolution of Diamond NV Color Core Quantum Magnetometer reaches micron size, while the probe size of the world-renowned Swiss Metrolab PT2025 Nuclear Magnetic Resonance Magnetometer is millimeter scale, and the gradient of the magnetic field to be measured has stringent requirements, which is usually required to be less than 1,000 ppm/cm. Diamond NV Color Core Quantum Magnetometer is expected to solve the problem of the lack of quantum metrology technology for large magnetic field gradient, as the magnetic field-sensitive core material has only micron size. solve the problem of lack of quantum metrology technology for large magnetic field gradients. The team has successfully realized the self-traceable microscopic measurement of magnetic field strength on the surface of a single cylindrical permanent magnet.
Microscopic Self-Traceable Measurement of the Surface Magnetic Field of High-End Samarium Cobalt Permanent Magnets
The Quantum Precision Measurement team at SPS has long been engaged in the research of methodology and development of experimental systems for quantum precision measurement technology, exploring the application of quantum precision measurement in cutting-edge fields such as chip testing, characterization of magnetic materials microtesting and magnetic field metrology.This achievement is one of the decades-long research accumulations of the research team of Peter Grünberg Research Center of Nanjing University of Posts and Telecommunications, which is supported by the National Key Research and Development Program and the Fundamental Strengthening Program of the National Key Research and Development Program of China in the field of technology.
