Journal
JOURNAL OF APPLIED PHYSICS
Volume 131, Issue 21, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0088988
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Funding
- Nuclear Decommissioning Authority (NDA)
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This study investigated the giant magnetoimpedance (GMI) and giant stress impedance (GSI) behaviors of amorphous ribbons made of three commercially available materials under longitudinal stress/strain. The linearity of the ribbons' GSI responses and gauge factors was measured to compare their stress/strain sensing performance. The study found that different materials exhibited different performances for different strains, which were dependent on the saturation magnetostriction constants ( lambda s ) and Young's moduli (E) of the materials.
The giant magnetoimpedance (GMI) and giant stress impedance (GSI) behaviors of amorphous ribbons composed of three commercially available materials (Co66Si15B14Fe4Ni1, Fe81B13Si3.5C2, and Ni40Fe40Si + B19Mo1-2) with differing saturation magnetostriction constants ( lambda s ) and Young's moduli (E) were studied under longitudinal stress/strain. The linearity of the ribbons' GSI responses and gauge factors was measured to create a figure of merit and compare their stress/strain sensing performance for strains up to e = 10 x 10(-3). We observed that the Ni40Fe40Si + B19Mo1-2 ribbon displayed the best performance for low strains (e < 1 x 10(-3)), whereas the Co66Si15B14Fe4Ni1 ribbon displayed the best performance for higher strains (e < 10 x 10(-3)). We conclude that the suitability of a material for sensing strains in any given strain regime has a complex dependence on both lambda s and E, the former of which dictates both the absolute magnitude of the impedance variation materials exhibit (i.e., the dynamic range), while both lambda s and E control how their impedances vary with applied strain. (C) 2022 Author(s).
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