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Dynamic Magneto-mechanical Behavior of Magnetization-graded Ferromagnetic Materials |
Journal of Magnetics, Volume 19, Number 3, 30 Sep 2014, Pages 215-220 |
Lei Chen * (Key Lab of Computer Vision and Intelligent Information System, Chongqing University of Arts and Sciences), Yao Wang (Electrical and Computer Engineering Department, University of Minnesota) |
Abstract |
This study investigates the dynamic magneto-mechanical behavior of magnetization-graded ferromagnetic materials Terfenol-D/FeCuNbSiB (MF). We measure the dynamic magneto-mechanical properties as a function of the DC bias magnetic field (Hdc). Our experimental results show that these dynamic magneto-mechanical properties are strongly dependent on the DC bias magnetic field. Furthermore, the dynamic strain coefficient, electromechanical resonance frequency, Young’s moduli, and mechanical quality factor of Terfenol-D/FeCuNbSiB are greater than those of Terfenol-D under a lower DC bias magnetic field. The dynamic strain coefficient increases by a factor of between one and three, under the same DC bias magnetic field. In particular, the dynamic strain coefficient of Terfenol-D/FeCuNbSiB at zero bias achieves 48.6 nm/A, which is about 3.05 times larger than that of Terfenol-D. These good performances indicate that magnetization-graded ferromagnetic materials show promise for application in magnetic sensors.
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Keywords: dynamic magnetomechanical properties; dynamic strain coefficient; magnetization-graded ferromagnetic materials; magnetic sensor; magnetoelectric effect |
DOI: http://dx.doi.org/10.4283/JMAG.2014.19.3.215 |
Full Text: PDF |
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