Murugaiyan, Premkumar and Abhinav, Anand and Verma, Rahul and Panda, Ashis K and Mitra, Amitava and Baysakh, Sandip and Roy, Rajat K (2018) Influence of Al addition on structural, crystallization and soft magnetic properties of DC Joule annealed FeCo based nanocrystalline alloys. Journal of Magnetism and Magnetic Materials, 448 (SI). pp. 66-74. ISSN 0304-8853

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Abstract

The effect of minor Al addition on structural, crystallization, soft magnetic behaviour and magnetic field induced anisotropy through DC Joule annealing in (Fe53.95Co29.05)(83)Si1.3B11.7-xNb3Cu1Alx, (X = 0, 1) alloys has been studied. The Al added as-quenched melt spun ribbons show good glass forming ability, better thermo-physical properties like a high T-x1 of 438 degrees C, Tc-am of 435 degrees C and Tc-nc of 906 degrees C, compared to T-x1 of 389 degrees C, Tc-am of 409 degrees C and Tc-nc of 900 degrees C for the alloy without Al addition. The longitudinal magnetic field annealed Al added alloy exhibits low Hc of 12.92 A/m and maximum Ms. of 1.78 T. The better soft magnetic properties of Al added alloy are achieved through a high nucleation density of BCC-FeCo(Al) nanocrystallites having low K-1 and lambda values. The as-quenched alloys possess high magneto-strain exceeding 30 ppm and approach near zero value on nanocrystallization. The longitudinal magnetic field assisted DC Joule annealing, having current density (J) in the range of J = 20-25 A/mm(2) promotes good magnetic softening due to precipitation of 5-35 nm nanocrystallites as explained by extended-random anisotropy model. The Al added alloy shows better magnetic field induced anisotropy (K-u) on nanocrystallization and shows visible change in the shape of hysteresis loop. (C) 2017 Elsevier B.V. All rights reserved.

Item Type:	Article
Additional Information:	International Conference on Magnetic Materials and Applications (ICMAGMA), Hyderabad, INDIA, FEB 01-03, 2017
Subjects:	Engineering Materials
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	05 Sep 2018 07:41
Last Modified:	05 Sep 2018 07:41
URI:	http://cgcri.csircentral.net/id/eprint/4322

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