Álvaro Peña, Daniel Matatagui, Carlos Cruz, Patricia Marcela de la Presa, Mari Carmen Horrillo, Pilar Marin
5th Young Researchers in Magnetism
10 y 11 de noviembre de 2021, Girona, España.
Magnetoelastic resonance occurs when a device, made of a magnetoelastic material, is subjected to an alternating magnetic field with a given frequency, this being the natural resonant frequency of the said device. As this frequency depends on various factors, such as temperature, the viscosity of the surroundings or changes in the mass of the device, it is possible to create a sensor of such factors that can be operated remotely using magnetic fields. Typically, magnetoelastic ribbons have been used for such devices, and extensive knowledge can be found throughout the scientific literature [1]. On the other hand, microwires, made of an amorphous metallic nucleus with a glass coating, are lesser-known, and fewer examples have been reported.
In previous work, we reported a comparison between magnetoelastic ribbons and microwires, demonstrating that, while ribbons have a better magnetoelastic response, it is negatively affected upon dimensional down-sizing to the scale of microwires. Whereas microwires, while having a not-as-good response, it is lesser affected by their size. Leading to the hypothesis that if microwire’s magnetoelastic response were improved, they would be a great alternative to ribbons [2].
In this work, we have studied the magnetoelastic response of microwires with different diameters, thermally treated at temperatures between 200-400ºc, including “as cast” microwires, and, under different bias fields, to find the optimal characteristic for microwires to be used in the aforementioned sensor devices.
Acknowledgements
This work was funded by the Ministerio de Ciencia e Innovación (MICINN) through project RTI2018-095856-B-C21. A. P. acknowledges the financial support of FPI grant PRE2019-087500 from MICINN.
References
[1] C. A. Grimes, S. C. Roy, S. Rani, and Q. Cai, Sensors 11 (2011) 2809-2844.
[2] A. Peña, D. Matatagui, C. Cruz, P. De La Presa, P. Marín, C. Horrillo, Proceedings of the 2021 13th Spanish Conference on Electron Devices, CDE 2021. (2021) 106-109.
