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Development of soft magnetic composites for low-loss applications

Lookup NU author(s): Dr Ian Gilbert, Professor Steve BullORCiD, Emeritus Professor Terry Evans, Professor Alan Jack

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Abstract

Soft magnetic composite materials have been pressed into cylinders using both monotonic and cyclic loading over the pressure range 200-800 MPa. Some samples have subsequently been heat treated over the temperature range 200-600°C. Magnetic Barkhausen noise (MBN) analysis has been used to look at the effects of these various processing stages. Increasing pressing pressure shows an increase in the MBN peak signal. Cyclic pressed samples exhibited larger values of peak MBN signal than the equivalent monotonic load. Subsequent heat treatments decreased the MBN signal. The changes in MBN signal are attributed to the strain-induced changes in domain alignment in the adjacent grains during the pressing process. © 2002 Elsevier Science B.V. All rights reserved.

Publication metadata

Author(s): Gilbert IP, Moorthy V, Bull SJ, Evans JT, Jack AG

Publication type: Article

Publication status: Published

Journal: Journal of Magnetism and Magnetic Materials

Year: 2002

Volume: 242-245

Issue: I

Pages: 232-234

Print publication date: 01/04/2002

ISSN (print): 0304-8853

ISSN (electronic): 1873-4766

Publisher: Elsevier

URL: http://dx.doi.org/10.1016/S0304-8853(01)01252-5

DOI: 10.1016/S0304-8853(01)01252-5

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