Quantum Control Technology Empowers NdFeB Magnets, Achieving a Leap in Magnetic Performance

Recently, the "Quantum Spin Regulation" technology jointly developed by Zhongke Sanhuan and the Quantum Materials Laboratory of the University of Science and Technology of China has passed authoritative certification. This technology leverages the ultra-low-temperature quantum tunneling effect to precisely control the electron spin direction in NdFeB magnets, resulting in a 35% increase in magnetic energy product and opening up new pathways for high-end magnet applications.

Traditional NdFeB magnets rely on physical doping to optimize performance, making it difficult to overcome the thermodynamic limitations of magnetic moment alignment. The new technology employs quantum coherent manipulation techniques in an ultra-low-temperature environment of -269℃, modulating the 4f electron spin states of rare-earth elements through microwave pulses to achieve a 98% degree of定向排列 (oriented alignment) in magnetic domains. Observations using a quantum magnetic force microscope revealed that the surface magnetic field uniformity of the magnets reached 0.02 tesla/micron, a fivefold improvement over traditional processes.

The research team constructed an integrated "quantum annealing + magnetic field forming" device, enhancing the coercivity stability of the magnets to 95% and reducing magnetic losses by 40% under alternating magnetic fields. Verified by the National Magnetic Materials Testing Center, the magnets exhibited a mere 1.8% decay rate in magnetic performance under strong radiation environments, significantly lower than the industry standard of 6%, meeting the demands of spacecraft motors. Currently, the first mass production line has commenced operations, with products passing extreme working condition tests conducted by Tesla and SpaceX.

"This represents a landmark breakthrough in applying quantum technology to magnetic materials," stated an expert from the Chinese Society of Rare Earths. The technology enables a 20% reduction in the amount of magnets used in traction motors for maglev trains, translating to a savings of 420 tons of rare-earth resources annually based on a demand of 30,000 tons. The relevant findings have been published in Nature Materials, with eight international patents secured. Large-scale commercialization is anticipated by 2026.