Wederni, A.; Salaheldeen, M.; Ipatov, M.; Zhukova, V.; Zhukov, A. Influence of the Geometrical Aspect Ratio on the Magneto-Structural Properties of Co2MnSi Microwires. Metals2023, 13, 1692.
Wederni, A.; Salaheldeen, M.; Ipatov, M.; Zhukova, V.; Zhukov, A. Influence of the Geometrical Aspect Ratio on the Magneto-Structural Properties of Co2MnSi Microwires. Metals 2023, 13, 1692.
Wederni, A.; Salaheldeen, M.; Ipatov, M.; Zhukova, V.; Zhukov, A. Influence of the Geometrical Aspect Ratio on the Magneto-Structural Properties of Co2MnSi Microwires. Metals2023, 13, 1692.
Wederni, A.; Salaheldeen, M.; Ipatov, M.; Zhukova, V.; Zhukov, A. Influence of the Geometrical Aspect Ratio on the Magneto-Structural Properties of Co2MnSi Microwires. Metals 2023, 13, 1692.
Abstract
The present study illustrates the strong effect of geometrical parameters on the magneto-structural properties of Co2MnSi glass-coated microwires prepared using the Taylor-Ulitovsky method. Thus, two samples with different geometrical aspect ratios (ρ= d / D) have been fabricated, where d is the metallic nuclei diameter and D is the total diameter of the Co2MnSi microwire. The XRD analysis shows a significant change by modifying the aspect ratio, for ρ = 0.46 the main peak with miller indices (220) is recognized as an A2-type disordered cubic structure. Meanwhile, in the sample with a low aspect ratio, ρ = 0.31, the perfect L21 ordered cubic structure is attained. In addition, a decrease in average grain size from 36.62 nm to 28.07 nm by increasing the aspect ratio from 0.46 to 0.31 is observed. The magnetic characterization has been done in a wide range of temperatures and magnetic fields. Both of Co2MnSi samples show ferromagnetic behavior in a whole measuring temperatures range. A significant increase in coercivity and normalized reduced remanence by decreasing the aspect ratio is observed. The change in the magnetic properties is attributed to the modification in the microstructure, which is induced during the fabrication process. Such a dependence on the microstructure and magnetic properties on the ρ-ratio can be associated either with the internal stresses distribution and magnitude or with different quenching rates of microwires with different aspect ratios. The current findings demonstrate the tunability of microstructure and magnetic properties of Co2MnSi-glass-coated microwires simply, by a small modification in the geometric properties during the manufacturing process and without excreting any additional post-processing. The variation in geometric parameters of Co2MnSi glass-coated microwires allows us to tune magnetic properties and structure, which is essentially advantageous for sensing devices development.
Keywords
Heusler alloys; Glass-coated microwires; Magnetic properties; magnetic behavior; XRD analysis.
Subject
Chemistry and Materials Science, Metals, Alloys and Metallurgy
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
