Fe_xNi_(100-x)Thin Film Systems with Slight Deviations from Zero Magnetostriction Compositions: Focus on Pressure Sensor Applications

摘要

The structure, magnetic properties, ferromagnetic resonance and giant magnetoimpedance effect (GMI) were studied in Fe_xNi_(100-x) thin films and multilayered systems having compositions with small deviation from zero magnetostriction in order to find the best conditions for possible applications in the area of small pressure sensors. A comparative analysis of the effective magnetization and g-factor was carried out for the thin films of Fe_xNi_(100-x) (x = 19.8, 17.5, 15.0, 11.9) alloys. Comparison of the concentration dependences for static AnMs and dynamic AnMeff magnetization values allows to select a narrow interval of concentrations around Fe_(15)Ni_(85) for the development of a microfluidic small pressure sensitive elements based on GMI effect. The maximum value of GMI ratio (AZ/Z) ratio shows linear dependence on the iron content in the Fe_xNi_(100-x) alloy for the concentration range under consideration.