期刊
APPLIED PHYSICS LETTERS
卷 103, 期 8, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4819179
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资金
- NSF [DMR-1210850, DMR-0748810, ECCS-1002358]
- FAME Center, one of six centers of STARnet, a Semiconductor Research Corporation program
- MARCO
- DARPA
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0748810, 1210850] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1002358] Funding Source: National Science Foundation
Spin transfer torque can excite ferromagnetic resonance of magnetization in a nanoscale magnetic tunnel junction. Here we describe a strongly nonlinear regime of spin-torque-driven ferromagnetic resonance in which large-amplitude magnetization oscillations are excited by microwave current applied to the junction. In this nonlinear regime, the junction generates a large direct voltage in response to the applied microwave signal and thereby can serve as a sensitive microwave signal detector. We demonstrate a low-temperature detector sensitivity of 2.5 x 10(4) V/W, which exceeds the sensitivity of metal-semiconductor Schottky diodes. (C) 2013 AIP Publishing LLC.
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