Abstract
The results of the investigation on tensile stress dependence of the SAMR (small angle magnetization rotation) signal in soft magnetic amorphous ribbons are presented. Exemplary results for commercially available, negatively magnetostrictive 2705M, 2714A, and 6030D amorphous ribbons show significant stress dependence, in contrast to positively magnetostrictive 2826MB alloy. The magnetoelastic hysteresis of the obtained characteristics is compared, as well as the influence of the biasing H field and supply current variations. Based on the results, 2705M alloy with near-zero negative magnetostriction is proposed as best suited for a SAMR-based, magnetoelastic force sensor.
Highlights
Soft magnetic amorphous ribbons are widely known for their unique mechanical and magnetic properties [1,2,3,4,5,6,7]
The magnetostriction is of great concern due to the connection between the saturation magnetostriction constant and the relative permeability of the amorphous ribbon [11]
While the SAMR method was intended for research into magnetostriction behavior of soft magnetic materials, the above equations, as well as measurement practice, suggest a significant influence of tensile stresses on the magnetization rotation angle θ, and on the e2 f signal induced in measurement coil
Summary
Soft magnetic amorphous ribbons are widely known for their unique mechanical and magnetic properties [1,2,3,4,5,6,7]. While the SAMR method was intended for research into magnetostriction behavior of soft magnetic materials, the above equations, as well as measurement practice, suggest a significant influence of tensile stresses on the magnetization rotation angle θ, and on the e2 f signal induced in measurement coil. It is, possible to develop a new kind of magnetoelastic force sensor, utilizing a non-balanced SAMR signal. Based on these experimental results, the most promising of the tested materials is proposed
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