Abstract
The preparation and soft magnetic properties of (Co0.6Fe0.3Ni0.1)70−x (B0.811Si0.189)25+x Nb5 (x = 0–4) glassy alloys were investigated. This multicomponent system was found to exhibit a distinct glass transition and a wide supercooled liquid region of over 50 K before crystallization. As a result, the (Co0.6Fe0.3Ni0.1)70−x (B0.811Si0.189)25+x Nb5 bulk glassy alloys with diameters up to 5 mm were produced by copper mold casting. In addition to high glass-forming ability, the Co-based glassy alloys also exhibit excellent soft-magnetic properties, i.e., saturation magnetization of 0.54–0.72 T, low coercive field of 0.7–1.4 A/m, and high effective permeability of 18,600–22,400 at 1 kHz under a field of 1 A/m. Furthermore, the giant magneto impedance effects of the (Co0.6Fe0.3Ni0.1)68(B0.811Si0.189)27Nb5 glassy ribbon at different driving frequencies were also investigated. The results show that the largest impedance ratio is as high as 138 % at the frequency of 2.5 MHz under an ac current of 0.2 mA, together with high field sensitivity of 12.5 %/Oe.
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This work was supported by the National Natural Science Foundation of China (Grant Nos. 51271194 and 51301189), Ningbo Science and Technology Innovation Team (Grant No. 2011B82004).
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Dong, Y., Man, Q., Chang, C. et al. Preparation and magnetic properties of (Co0.6Fe0.3Ni0.1)70−x (B0.811Si0.189)25+x Nb5 bulk glassy alloys. J Mater Sci: Mater Electron 26, 7006–7012 (2015). https://doi.org/10.1007/s10854-015-3320-9
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DOI: https://doi.org/10.1007/s10854-015-3320-9