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https://doi.org/10.1149/ma2020-02653296mtgabs
Journal: ECS Meeting Abstracts | Publication Date: Nov 23, 2020 |
License type: iop-standard |
Magnetoelastic materials such as CoFe and NiFeCo alloys display Joule magnetostriction. This property of ferromagnetic materials is usually minimized as a loss mechanism in applications such as inductor or transformer cores. Though, for use as a resonating material in a sensor application, this material provides a battery-less system where an external device can apply a magnetic field and receive a magnetic “signal” in return based upon the resonant frequency, geometry, and mass. As-deposited CoFe and NiFeCo films have no measurable resonant frequency when analyzed with a vector network analyzer and biasing Helmholtz coils. To control magnetic properties of the electrodeposited alloys, the stoichiometry was controlled and additional elements such as boron, niobium, silicon, germanium, and holmium were added to the chemistry. The electrical resistivity was increased and the magnetic properties such as permeability, coercivity, and magnetic saturation were controlled and comparable to commercial, extruded ribbon materials such as Metglas. Annealing studies in a magnetic field, applied both parallel and perpendicular to the easy axis of the NiFeCoBNbSi and other alloy films, were used to adjust the anisotropy and the permeability of the material.Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA-0003525, SAND2020-5481 A . The views expressed in the article do not necessarily represent the views of the U.S. Department of Energy or the United States Government.
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