About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Magnetic Materials for Energy and Power Conversion Applications
|
Presentation Title |
Engineering of Magnetic Properties of Co-rich Microwires by Post-processing |
Author(s) |
Lorena Gonzalez-Legarreta, Valentina Zhukova, Paula Corte-Leon, Mihail Ipatov, Juan Maria Blanco, Arcady Zhukov |
On-Site Speaker (Planned) |
Arcady Zhukov |
Abstract Scope |
Magnetic microwires exhibiting excellent magnetic and mechanical properties are extremely demanded by industries [1,2]. We present our results on tailoring of magnetic properties and giant magnetoimpedance (GMI) effect of Co-rich glass-coated microwires by conventional annealing and stress-annealing at temperatures from 200 up to 375 oC.
Considerable coercivity, Hc, increase and transformation of hysteresis loops from linear to rectangular are observed upon conventional annealing. Despite that the stress-annealed microwires also present rectangular hysteresis loops, the Hc –values of such microwires are considerably lower than that of annealed without stress. We also observed an increase of GMI ratio in annealed and stress-annealed microwires as compared to as-prepared microwires.
In annealed and stress-annealed samples presenting rectangular hysteresis loops we observed the single DW propagation. The DW velocity, v, and DW mobility, S, depend on annealing conditions. At certain annealing conditions we observed v up to 4 km/s and S up to 29 m2/sA. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |