NDLI: Giant magnetoimpedance intrinsic impedance and voltage sensitivity of rapidly solidified Co66Fe2Cr4Si13B15 amorphous wire for highly sensitive sensors applications

Content Provider	Springer Nature Link
Author	Das, Tarun K. Banerji, Pallab Mandal, Sushil K.
Copyright Year	2016
Abstract	We report a systematic study of the influence of wire length, L, dependence of giant magneto-impedance (GMI) sensitivity of Co66Fe2Cr4Si13B15 soft magnetic amorphous wire of diameter ~100 µm developed by in-water quenching technique. The magnetization behaviour (hysteresis loops) of the wire with different length (L = 1, 2, 3, 5, 8 and 10 cm) has been evaluated by fuxmetric induction method. It was observed that the behaviour of the hysteresis loops change drastically with the wire length, being attributed to the existence of a critical length, L C, found to be around 3 cm. GMI measurements have been taken using automated GMI measurement system and the GMI sensitivities in terms of intrinsic impedance sensitivity (S Ω/Am −1) and voltage sensitivity (S V/Am −1) of the wire have been evaluated under optimal bias field and excitation current. It was found that the maximum (S Ω/Am −1) max ≈ 0.63 Ω/kAm−1/cm and (S V/Am −1) max ≈ 3.10 V/kAm−1/cm were achieved at a critical length L C ~ 3 cm of the wire for an AC current of 5 mA and a frequency of 5 MHz. These findings provide crucial insights for optimization of the geometrical dimensions of magnetic sensing elements and important practical guidance for designing high sensitive GMI sensors. The relevant combinations of magnetic material parameters and operating conditions that optimize the sensitivity are highlighted.
Starting Page	1
Ending Page	8
Page Count	8
File Format	PDF
ISSN	09478396
Journal	Applied Physics A
Volume Number	122
Issue Number	11
e-ISSN	14320630
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-10-07
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Condensed Matter Physics Optical and Electronic Materials Nanotechnology Characterization and Evaluation of Materials Surfaces and Interfaces, Thin Films Operating Procedures, Materials Treatment
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Science

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