Co-rich Amorphous Microwires with Improved Giant Magnetoimpedance Characteristics Due to Glass Coating Etching
| Autor: | V. A. Bautin, Nikita S. Kholodkov, A.V. Popova, S.A. Gudoshnikov, N. A. Usov |
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| Rok vydání: | 2019 |
| Předmět: |
Quenching
Materials science 0211 other engineering and technologies General Engineering Giant magnetoimpedance 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Magnetic field Amorphous solid Stress (mechanics) Magnetization Coating Etching (microfabrication) engineering General Materials Science Composite material 0210 nano-technology 021102 mining & metallurgy |
| Zdroj: | JOM. 71:3113-3118 |
| ISSN: | 1543-1851 1047-4838 |
| DOI: | 10.1007/s11837-019-03574-w |
| Popis: | Glass-coated Co-rich amorphous microwires are very promising for the development of tiny magnetic sensors that can be used in portable electronic devises. In this study, a substantial decrease in the residual quenching stress in Co-rich microwires is achieved by reducing the thickness of the glass coating by means of precise etching of the wire in a specially designed gel. This effect is confirmed experimentally by means of the small-angle magnetization rotation method as well as by direct measurement of the off-diagonal component of the giant magnetoimpedance (GMI) tensor of wires with different thicknesses of glass coating as a function of the applied magnetic field. A reduction in the thickness of the glass coating to the range of 0.5–2.0 µm resulted in a nearly twofold increase in the steepness of the off-diagonal GMI component of the studied Co-rich microwires. Therefore, this method can be used to improve the sensitivity of miniature magnetic sensors to weak external magnetic fields. |
| Databáze: | OpenAIRE |
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