Wireless current sensing by near field induction from a spin transfer torque nano-oscillator

被引：11

作者：

Ramaswamy, B. ^{[1
]}

Algarin, J. M. ^{[2
]}

Weinberg, I. N. ^{[3
]}

Chen, Y. -J. ^{[4
]}

Krivorotov, I. N. ^{[4
]}

Katine, J. A. ^{[5
]}

Shapiro, B. ^{[1
,6
]}

Waks, E. ^{[2
]}

机构：

[1] Univ Maryland, Fischell Dept Bioengn, College Pk, MD 20742 USA

[2] Univ Maryland, IREAP, College Pk, MD 20742 USA

[3] Weinberg Med Phys LLC, Bethesda, MD 20817 USA

[4] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[5] HGST Res Ctr, San Jose, CA 95135 USA

[6] Univ Maryland, ISR, College Pk, MD 20742 USA

来源：

APPLIED PHYSICS LETTERS | 2016年 / 108卷 / 24期

基金：

美国国家科学基金会;

关键词：

COHERENT MICROWAVE EMISSION; MAGNETIC TUNNEL-JUNCTION; PERPENDICULAR-ANISOTROPY; POLARIZED CURRENT; DRIVEN; SENSORS;

D O I：

10.1063/1.4953621

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate that spin transfer torque nano-oscillators ( STNO) can act as wireless sensors for local current. The STNO acts as a transducer that converts weak direct currents into microwave field oscillations that we detect using an inductive coil. We detect direct currents in the range of 300-700 mu A and report them wirelessly to a receiving induction coil at distances exceeding 6.5mm. This current sensor could find application in chemical and biological sensing and industrial inspection. Published by AIP Publishing.

引用

页数：5

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