Model of output characteristics of giant magnetoresistance (GMR) multilayer sensor

doi:10.1088/1674-1056/28/8/087501

Abstract In this paper, the giant magnetoresistance (GMR) multilayer sensor is fabricated with a Wheatstone bridge, and it exhibits excellent performance with a sensitivity of 2.8349 mV/(V/Oe) (1 Oe=79.5775 A·m^-1) and a saturation field of 26 Oe along the sensitive axis. The GMR sensor is also characterized in a high magnetic field. The sensitivity decreases from 2.8349 mV/(V/Oe) at an angle of 0° to 0.0175 mV/(V/Oe) at an angle of 90°. Then, the sensor is placed in a series of rotating magnetic fields. We propose a model to express the output characteristics of the GMR multilayer sensor. The transfer curves of the sensor can be shown as two exactly symmetrical circles with an increasing radius when the magnetic field increases. The experimental results are consistent with the simulation results of the model. The advantage of this model is that it is simpler and more intuitive.

Keywords: giant magnetoresistance sensor phenomena and characterization angular dependence

Received: 19 February 2019
Revised: 22 May 2019
Accepted manuscript online:

PACS:	75.47.De	(Giant magnetoresistance)
	75.60.Ej	(Magnetization curves, hysteresis, Barkhausen and related effects)
	75.70.Cn	(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
	72.15.Gd	(Galvanomagnetic and other magnetotransport effects)

Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2018YFF01010701), the Natural Science Foundation of Zhejiang Province, China (Grant No. LQ17F010004), and the National Natural Science Foundation of China (Grant No. 61741506).

Corresponding Authors: Zheng-Hong Qian
E-mail: zqian@hdu.edu.cn

Cite this article:

Jiao-Feng Zhang(张教凤), Zheng-Hong Qian(钱正洪), Hua-Chen Zhu(朱华辰), Ru Bai(白茹), Jian-Guo Zhu(朱建国) Model of output characteristics of giant magnetoresistance (GMR) multilayer sensor 2019 Chin. Phys. B 28 087501

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Model of output characteristics of giant magnetoresistance (GMR) multilayer sensor

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