Advanced
search

To read this content please select one of the options below:

Temperature relevant performance and calibration of spin-valve sensor

Huachen Zhu (College of Materials Science and Engineering, Sichuan University, Chengdu, China and Center for Integrated Spintronic Devices, Hangzhou Dianzi University, Hangzhou, China)
Zhenghong Qian (Center for Integrated Spintronic Devices, Hangzhou Dianzi University, Hangzhou, China and College of Materials Science and Engineering, Sichuan University, Chengdu, China)
Jiaofeng Zhang (College of Materials Science and Engineering, Sichuan University, Chengdu, China and Center for Integrated Spintronic Devices, Hangzhou Dianzi University, Hangzhou, China)
Yucheng Sun (College of Materials Science and Engineering, Sichuan University, Chengdu, China and Center for Integrated Spintronic Devices, Hangzhou Dianzi University, Hangzhou, China)
Ru Bai (Center for Integrated Spintronic Devices, Hangzhou Dianzi University, Hangzhou, China)
Jianguo Zhu (College of Materials Science and Engineering, Sichuan University, Chengdu, China)

Sensor Review

ISSN: 0260-2288

Article publication date: 27 September 2019

Issue publication date: 5 November 2019

161

Abstract

Purpose

It has been noted that the spin-valve sensor exhibits lower sensitivity with higher temperature because of the variation of GMR ratio, which could lead to the measurement error in applications where working temperature changes largely over seasons or times. This paper aims to investigate and compensate the temperature effect of the spin-valve sensor.

Design/methodology/approach

A spin-valve sensor is fabricated based on microelectronic process, and its temperature relevant properties are investigated, in which the transfer curves are acquired within a temperature range of −50°C to 125°C with a Helmholtz coil and temperature chamber.

Findings

It is found that the sensitivity of spin-valve sensor decreases with temperature linearly, where the temperature coefficient is calculated at −0.25 %/°C. The relationship between sensitivity of spin-valve sensor and temperature is well-modeled.

Originality/value

The temperature drift model of the spin-valve sensor’s sensitivity is highly correlated with tested results, which could be used to compensate the temperature influence on the sensor output. A self-compensation sensor system is proposed and built based on the expression modeled for the temperature dependence of the sensor, which exhibits a great improvement on temperature stability.

Keywords

Citation

Zhu, H., Qian, Z., Zhang, J., Sun, Y., Bai, R. and Zhu, J. (2019), "Temperature relevant performance and calibration of spin-valve sensor", Sensor Review, Vol. 39 No. 6, pp. 881-886. https://doi.org/10.1108/SR-01-2019-0005

Publisher

:

Emerald Publishing Limited

Copyright © 2019, Emerald Publishing Limited

Related articles

Manage cookies

We’re listening — tell us what you think

Join us on our journey