Lookup NU author(s): Dr Ian Gilbert,
Professor Steve Bull,
Emeritus Professor Terry Evans,
Professor Alan Jack
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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.
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
Print publication date: 01/04/2002
ISSN (print): 0304-8853
ISSN (electronic): 1873-4766
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