Title:
MEDIUM AND LARGE MAGNETIC FIELD MEASUREMENT METHOD AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/090635
Kind Code:
A1
Abstract:
A method and system for measuring medium and large magnetic fields, said medium and large magnetic field measurement method comprising the following steps: measuring an arbitrary externally applied magnetic field to obtain resistance values R1 and R2 of two tunneling magnetoresistance resistors having different easy axial directions, and also using initial reference layer magnetization directions of the two tunneling magnetoresistance resistors when not in a magnetic field as given reference layer magnetization directions, and calculating on the basis of the resistance values of the two tunneling magnetoresistance resistors an angle between a free layer magnetization direction and the reference layer magnetization direction for each of the two tunneling magnetoresistance resistors; on the basis of the given reference layer magnetization directions of each of the two tunneling magnetoresistance resistors and the angles between the free layer magnetization directions and reference layer magnetization directions of the two tunneling magnetoresistance resistors, calculating free layer magnetization directions for the two tunneling magnetoresistance resistors; on the basis of the given reference layer magnetization directions of the two tunneling magnetoresistance resistors and the free layer magnetization directions of the two tunneling magnetoresistance resistors, solving for the magnitude and direction of the externally applied magnetic field.
Inventors:
HE JINLIANG (CN)
OUYANG YONG (CN)
HU JUN (CN)
WANG SHANXIANG (CN)
ZHAO GEN (CN)
WANG ZHONGXU (CN)
ZENG RONG (CN)
ZHUANG CHIJIE (CN)
ZHANG BO (CN)
YU ZHANQING (CN)
OUYANG YONG (CN)
HU JUN (CN)
WANG SHANXIANG (CN)
ZHAO GEN (CN)
WANG ZHONGXU (CN)
ZENG RONG (CN)
ZHUANG CHIJIE (CN)
ZHANG BO (CN)
YU ZHANQING (CN)
Application Number:
PCT/CN2017/090546
Publication Date:
May 24, 2018
Filing Date:
June 28, 2017
Export Citation:
Assignee:
UNIV TSINGHUA (CN)
SICHUAN ENERGY INT RES INST TSINGHUA UNIV (CN)
SICHUAN ENERGY INT RES INST TSINGHUA UNIV (CN)
International Classes:
G01R33/09
Foreign References:
| CN106772147A | 2017-05-31 | |||
| CN101044412A | 2007-09-26 | |||
| US20140266185A1 | 2014-09-18 | |||
| CN202351418U | 2012-07-25 | |||
| CN104076302A | 2014-10-01 | |||
| CN105093138A | 2015-11-25 | |||
| CN102288927A | 2011-12-21 |
Attorney, Agent or Firm:
CHENGDU JIUDINGTIANYUAN INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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