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Recently, a research team from Beihang University’s School of Integrated Circuit Science and Engineering, led by Professor Zhao Weisheng and Professor Zhang Yue, has made a significant leap forward in the realm of ultrafast spintronic devices. By employing a CoTb/Ti/CoFeB/MgO multilayer structure, the team harnessed the robust spin-orbit coupling effect of the rare-earth element Tb within the ferrimagnetic material CoTb, successfully achieving picosecond-scale, fully electrical vertical magnetic moment switching. This accomplishment sets a new global benchmark for similar devices, with the shortest write pulse width attaining 16 picoseconds and single-bit power consumption plummeting to a mere 41 femtojoules. It paves the way for spintronic devices to enter the terahertz ultrafast operating frequency range, marking a substantial advancement in the field.
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