Frequency conversion of microwave signal without direct bias current using nanoscale magnetic tunnel junctions

被引：3

作者：

Algarin, J. M. ^{[1
]}

Ramaswamy, B. ^{[2
]}

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

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

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

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

Shapiro, B. ^{[2
,6
]}

Waks, E. ^{[1
]}

机构：

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

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

[3] Weinberg Med Phys Inc, North Bethesda, MD 20852 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：

SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期

关键词：

SPIN; DESIGN;

D O I：

10.1038/s41598-018-37415-8

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Frequency conversion forms an integral block of the electronic circuits used in various applications including energy harvesting, communications and signal processing. These frequency conversion units however require external power sources and occupy a large device footprint making it difficult to be integrated in micro-circuits. Here we demonstrate that nanoscale magnetic tunnel junctions can act as frequency converters without an external power supply or DC bias source. The device directly mixes an external microwave signal with the internal spin precession oscillations to create new frequencies tunable by an external magnetic field in a single device with a small device footprint. We observe up-conversion and down-conversion of the input signal for excitation frequencies between 2 GHz and 6 GHz. We also show that the device acts as a zero-bias rectifier that can generate voltages exceeding 12 mV when the excitation frequency matches the natural oscillations mode of the device.

引用

页数：7

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[1] RFID technologies: Supply-chain applications and implementation issues [J].