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Effect of Field Annealing Induced Magnetic Anisotropy on the Performance of Meander‐Core Orthogonal Fluxgate Sensor
Author(s) -
Zhi Shaotao,
Lei Chong,
Yang Zhen,
Feng Zhu,
Guo Lei,
Zhou Yong
Publication year - 2018
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201800400
Subject(s) - fluxgate compass , anisotropy , materials science , ribbon , annealing (glass) , condensed matter physics , amorphous solid , nuclear magnetic resonance , excitation , magnetic anisotropy , magnetic field , magnetometer , perpendicular , optics , physics , electrical engineering , composite material , magnetization , engineering , chemistry , crystallography , geometry , mathematics , quantum mechanics
The magnetic anisotropy field distribution is discussed for Co‐based amorphous ribbon annealed under different field conditions leading to different induced anisotropies: longitudinal field (LF) and transversal field (TF) annealing. In order to understand the relation between the field annealing‐induced anisotropy and the performance of meander‐core orthogonal fluxgate sensor, field‐annealed ribbons with different in‐plane anisotropies as cores of orthogonal fluxgate sensors are employed and both noise and sensitivity in fundamental mode are measured. Experimental results indicate that LF annealing‐induced anisotropy with easy axis perpendicular to the direction of excitation field can effectively improve the sensor sensitivity. On the other hand, TF annealing‐induced anisotropy with easy axis parallel to excitation field results in lower sensitivity, but the noise is also lower. The results obtained are useful for developing the high‐performance orthogonal fluxgate sensors based on amorphous ribbon cores.