Helical shell-domain structure in laser-annealed Co-based amorphous microwires analyzed by giant magnetoimpedance

다국어 초록 (Multilingual Abstract)

A commercial glass-covered, Co-based amorphous microwire (Co_(67)Fe_(3.8)Ni_(1.4)B_(11.5)Si_(14.6)Mo_(1.7)) is etched in order to remove its glass cover in a 60.51 % hydrofluoric acid solution, and annealed in air by illuminating with a pulsed Nd:YAG laser beams with an energy E of 48 mJ/pulse. Giant magnetoimpedance (GMI) profiles at a frequency f are measured as function of the angle θ of the external field, H, with respect to the wire axis. The sign of the H values at the peak of the GMI profiles for f = 100 kHz and at the dip of the GMI profiles for f = 10 MHz, H_(p) and H_(d), respectively, change at θ = 85-90° reflecting that the tilt angle of the helical domains is between 0° and 5° from the circular direction for the as-etched samples. The variations of H_(p) and H_(d) with θ for the sample with E = 48 mJ/pulse and H_(a) = 20 Oe show a change in sign of Hp and Hd at θ=90-100°, reflecting that the tilt angle of the helical domains is decreased by about -10° compared to that of the as-etched sample.

목차 (Table of Contents)

• 1. Introduction
• 2. Experimental
• 3. Results and discussion
• Acknowledgements
• References