Abstract
The effect of external tensile stress on the hysteresis loops of nearly-zero magnetostrictive glass-coated amorphous microwires of (Co 100− x Mn x ) 0.75Si 10B 15 (10< x<11) and Co 56.5Fe 6.5Ni 10B l6Si 11 compositions of metallic nucleus has been studied. All hysteresis loops have a rectangular shape without applied stress. Significant changes in the shape of the hysteresis loop are produced by the application of tensile stress, particularly the hysteresis loop of the sample (Co 92Mn 8) 75Si 10B 15 under a loading of 10 g, becoming flat with reduced values of both remanence and coercivity. These changes of the hysteresis loop with the external strain have been used to design a magnetoelastic sensor of liquid level.
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