Nonlinear amplification of microwave signals in spin-torque oscillators.

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 (<-40 dBm) at an appropriate choice of the bias field direction and amplitude. Based on micromagnetic simulations and experiments, we describe the fundamental as

SUBMITTER: Zhu K 

PROVIDER: S-EPMC10110546 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature