Torsion-Impedance in Soft Magnetic Amorphous and Nanocrystalline Wires

Abstract:

The measurements of magneto-impedance,, have been performed, at the frequency f = 1 MHz, on amorphous and nanocrystalline wires under the application of torsion stress ( = 0-125 rad/m). At , exhibit single-peak due to the axial easy direction of the wires. The torsion-impedance,, is defined as the impedance change with at the condition of the axial field H = 0. We found that at the low torsion , shows a maximum at = 0.87 and 5.23 rad/m for the amorphous and the nanocrystalline samples, respectively; with increasing ,of the amorphous wire decreases monotonously and tends to the saturation, but of the nanocrystalline sample shows two more peaks at = 70.65 and 104.67rad/m. These results have been discussed considering the modification of domain structure by the applied torsion.

• Periodical: Advanced Materials Research (Volumes 476-478)
• Pages: 1159-1162
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.476-478.1159
• Online since: February 2012
• Authors: Jian Yong Wang, Yin Feng Li, Lan Zhu An, Su Qin Feng, Cheng Lin Wang, Xi Mei Zhao
• Keywords: Magneto-Impedance, Nanocrystalline Wires, Torsion-Impedance

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