Recent progress in the development of high-sensitivity tunneling magnetoresistive sensors

Xiaolu Yin; Yi Yang; Yen-Fu Liu; Jiong Hua; Andrei Sokolov; Dan Ewing; Paul J. De Rego; Kaizhong Gao; Sy-Hwang Liou

doi:10.1117/12.2529569

16 September 2019 Recent progress in the development of high-sensitivity tunneling magnetoresistive sensors

Xiaolu Yin, Yi Yang, Yen-Fu Liu, Jiong Hua, Andrei Sokolov, Dan Ewing, Paul J. De Rego, Kaizhong Gao, Sy-Hwang Liou

Proceedings Volume 11090, Spintronics XII; 110903H (2019) https://doi.org/10.1117/12.2529569
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States

Abstract

The development of high-sensitivity magnetic field sensors at low frequencies and ambient temperatures is of great importance for many practical applications, where different aspects of the sensor performance need to be considered. In this paper, it is presented that by tuning magnetic nanostructures of the free layers in magnetic tunnel junctions, widedynamic-range or ultra-high-sensitivity tunneling magnetoresistive sensors can be obtained. Tunneling magnetoresistive sensors with a linear response from -75 mT to +75 mT are demonstrated. Also, it is demonstrated that an optimized ultra-high-sensitivity magnetic sensor with a sensitivity of 57,790 %/mT can be achieved. This sensitivity is currently the highest among all magnetoresistive sensors that have been reported. The estimated noise of our magnetic sensor is 2.3 pT/Hz^1/2 at 1 Hz and 190 fT/Hz^1/2 at 100 Hz respectively. This tunneling magnetoresistive sensor dissipates only 25 μW of power when it operates under an applied voltage of 1 V at room temperature.

Citation Download Citation

Xiaolu Yin, Yi Yang, Yen-Fu Liu, Jiong Hua, Andrei Sokolov, Dan Ewing, Paul J. De Rego, Kaizhong Gao, and Sy-Hwang Liou "Recent progress in the development of high-sensitivity tunneling magnetoresistive sensors", Proc. SPIE 11090, Spintronics XII, 110903H (16 September 2019); https://doi.org/10.1117/12.2529569

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available