HIGH-sensitive magnetoresistive sensors with integrated micro-fabricated and external magnetic flux concentrators

X. Yin; S. Liou

doi:10.1109/INTMAG.2015.7156558

HIGH-sensitive magnetoresistive sensors with integrated micro-fabricated and external magnetic flux concentrators

X. Yin, S. Liou

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The sensitivity of the magnetoresistive sensors based on magnetic tunnel junctions (MTJs) are to reduce sources of noise, to increase the signal, and to understand the fundamental limitations involved. Relevant properties, such as tunneling magnetoresistance ratio (TMR), coercivity (H_c), exchange coupling field (H_e), domain structures, and noise sensitively depend on the free layer structure in the MTJ [1-9]. There are also external factors that affect the performance of the sensor, such as the design of magnetic concentrators [10]. We have studied the using of micro-magnetic concentrators and external magnetic concentrators to improve the sensitivity of the magnetoresistive sensor. By optimizing the TMR ratio, H_c, H_e, domain structures, noise and magnetic concentrators, we fabricate a sensor with a sensitivity as high as 5,146 %/mT. This magnetic sensor only dissipates 200 μW of power while operating under an applied voltage of 1 V.

Original language	English (US)
Title of host publication	2015 IEEE International Magnetics Conference, INTERMAG 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781479973224
DOIs	https://doi.org/10.1109/INTMAG.2015.7156558
State	Published - Jul 14 2015
Event	2015 IEEE International Magnetics Conference, INTERMAG 2015 - Beijing, China Duration: May 11 2015 → May 15 2015

Publication series

Name	2015 IEEE International Magnetics Conference, INTERMAG 2015

Other

Other	2015 IEEE International Magnetics Conference, INTERMAG 2015
Country/Territory	China
City	Beijing
Period	5/11/15 → 5/15/15

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering
Surfaces, Coatings and Films

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10.1109/INTMAG.2015.7156558

Cite this

Yin, X., & Liou, S. (2015). HIGH-sensitive magnetoresistive sensors with integrated micro-fabricated and external magnetic flux concentrators. In 2015 IEEE International Magnetics Conference, INTERMAG 2015 Article 7156558 (2015 IEEE International Magnetics Conference, INTERMAG 2015). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/INTMAG.2015.7156558

HIGH-sensitive magnetoresistive sensors with integrated micro-fabricated and external magnetic flux concentrators. / Yin, X.; Liou, S.
2015 IEEE International Magnetics Conference, INTERMAG 2015. Institute of Electrical and Electronics Engineers Inc., 2015. 7156558 (2015 IEEE International Magnetics Conference, INTERMAG 2015).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Yin, X & Liou, S 2015, HIGH-sensitive magnetoresistive sensors with integrated micro-fabricated and external magnetic flux concentrators. in 2015 IEEE International Magnetics Conference, INTERMAG 2015., 7156558, 2015 IEEE International Magnetics Conference, INTERMAG 2015, Institute of Electrical and Electronics Engineers Inc., 2015 IEEE International Magnetics Conference, INTERMAG 2015, Beijing, China, 5/11/15. https://doi.org/10.1109/INTMAG.2015.7156558

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abstract = "The sensitivity of the magnetoresistive sensors based on magnetic tunnel junctions (MTJs) are to reduce sources of noise, to increase the signal, and to understand the fundamental limitations involved. Relevant properties, such as tunneling magnetoresistance ratio (TMR), coercivity (Hc), exchange coupling field (He), domain structures, and noise sensitively depend on the free layer structure in the MTJ [1-9]. There are also external factors that affect the performance of the sensor, such as the design of magnetic concentrators [10]. We have studied the using of micro-magnetic concentrators and external magnetic concentrators to improve the sensitivity of the magnetoresistive sensor. By optimizing the TMR ratio, Hc, He, domain structures, noise and magnetic concentrators, we fabricate a sensor with a sensitivity as high as 5,146 %/mT. This magnetic sensor only dissipates 200 μW of power while operating under an applied voltage of 1 V.",

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HIGH-sensitive magnetoresistive sensors with integrated micro-fabricated and external magnetic flux concentrators

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