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Recently, ferromagnetic‐heterostructure spintronic terahertz (THz) emitters have been recognized as one of the most promising candidates for next‐generation THz sources, owing to their peculiarities of high efficiency, high stability, low cost, ultrabroad bandwidth, controllable polarization, and high scalability. Despite the substantial efforts, they rely on external magnetic fields to initiate the...
Terahertz Emitters
In article number 2204373, Xiaojun Wu, Caihua Wan, Jimin Zhao, Sai Chen, and co‐workers demonstrate efficient terahertz generation from a unique antiferromagnetic–ferromagnetic (IrMn3|CoFeB) heterostructure without an external magnetic field, using femtosecond laser pulse excitation. This can be attributed to the exchange bias or interfacial exchange coupling effect. Such field‐free...
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