Nonlinear amplification of microwave signals in spin-torque oscillators

Keqiang Zhu, Mario Carpentieri, Like Zhang, Bin Fang (), Jialin Cai, Roman Verba, Anna Giordano, Vito Puliafito, Baoshun Zhang, Giovanni Finocchio () and Zhongming Zeng ()
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Keqiang Zhu: Chinese Academy of Sciences
Mario Carpentieri: Politecnico di Bari
Like Zhang: Chinese Academy of Sciences
Bin Fang: Chinese Academy of Sciences
Jialin Cai: Chinese Academy of Sciences
Roman Verba: Institute of Magnetism
Anna Giordano: University of Messina
Vito Puliafito: Politecnico di Bari
Baoshun Zhang: Chinese Academy of Sciences
Giovanni Finocchio: University of Messina
Zhongming Zeng: Chinese Academy of Sciences

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract Spintronics-based microwave devices, such as oscillators and detectors, have been the subject of intensive investigation in recent years owing to the potential reductions in size and power consumption. However, only a few concepts for spintronic amplifiers have been proposed, typically requiring complex device configurations or material stacks. Here, we demonstrate a spintronic amplifier based on two-terminal magnetic tunnel junctions (MTJs) produced with CMOS-compatible material stacks that have already been used for spin-transfer torque memories. We achieve a record gain (|S11 | > 2) for input power on the order of nW (

Date: 2023
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DOI: 10.1038/s41467-023-37916-9

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