Spintronic nano-scale harvester of broadband microwave energy

Abstract

The harvesting of ambient radio-frequency (RF) energy is an attractive and clean way to realize the idea of self-powered electronics. Here we present a design for a microwave energy harvester based on a nanoscale spintronic diode (NSD). This diode contains a magnetic tunnel junction with a canted magnetization of the free layer, and can convert RF energy over the frequency range from 100 MHz to 1.2 GHz into DC electric voltage. An attractive property of the developed NSD is the generation of an almost constant DC voltage in a wide range of frequencies of the external RF signals. We further show that the developed NSD provides sufficient DC voltage to power a low-power nanodevice - a black phosphorus photo-sensor. Our results demonstrate that the developed NSD could pave the way for using spintronic detectors as building blocks for self-powered nano-systems, such as implantable biomedical devices, wireless sensors, and portable electronics.

arXiv comment29 pages,4 main figures

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Cited by in corpus (7)

• The promise of spintronics for unconventional computing
• Dynamics of domain walls motion driven by spin-orbit torque in antiferromagnets
• Hardware realization of the multiply and accumulate operation on radio-frequency signals with magnetic tunnel junctions
• Wireless communication between two magnetic tunnel junctions acting as oscillator and diode
• Low offset frequency $1/f$ flicker noise in spin torque vortex oscillators
• RF signal detector and energy harvester based on a spin-torque diode with perpendicular magnetic anisotropy
• Flicker and random telegraph noise between gyrotropic and dynamic C-state of a vortex based spin torque nano oscillator