The peak in anomalous magnetic viscosity

Collocott, SJ; Watterson, PA; Tan, XH; Xu, H

The peak in anomalous magnetic viscosity

Collocott, SJ Watterson, PA Tan, XH Xu, H

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Publication Type:: Journal Article
Citation:: Journal of Magnetism and Magnetic Materials, 2014, 360 pp. 118 - 125
Issue Date:: 2014-06-01

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Field	Value	Language
dc.contributor.author	Collocott, SJ	en_US
dc.contributor.author	Watterson, PA	en_US
dc.contributor.author	Tan, XH	en_US
dc.contributor.author	Xu, H	en_US
dc.date.issued	2014-06-01	en_US
dc.identifier.citation	Journal of Magnetism and Magnetic Materials, 2014, 360 pp. 118 - 125	en_US
dc.identifier.issn	0304-8853	en_US
dc.identifier.uri	http://hdl.handle.net/10453/115637
dc.description.abstract	Anomalous magnetic viscosity, where the magnetization as a function of time exhibits non-monotonic behaviour, being seen to increase, reach a peak, and then decrease, is observed on recoil lines in bulk amorphous ferromagnets, for certain magnetic prehistories. A simple geometrical approach based on the motion of the state line on the Preisach plane gives a theoretical framework for interpreting non-monotonic behaviour and explains the origin of the peak. This approach gives an expression for the time taken to reach the peak as a function of the applied (or holding) field. The theory is applied to experimental data for bulk amorphous ferromagnet alloys of composition Nd60-xFe 30Al10Dyx, x = 0, 1, 2, 3 and 4, and it gives a reasonable description of the observed behaviour. The role played by other key magnetic parameters, such as the intrinsic coercivity and fluctuation field, is also discussed. When the non-monotonic behaviour of the magnetization of a number of alloys is viewed in the context of the model, features of universal behaviour emerge, that are independent of alloy composition. © 2014 Published by Elsevier B.V. All rights reserved.	en_US
dc.relation.ispartof	Journal of Magnetism and Magnetic Materials	en_US
dc.relation.isbasedon	10.1016/j.jmmm.2014.02.046	en_US
dc.subject.classification	Applied Physics	en_US
dc.title	The peak in anomalous magnetic viscosity	en_US
dc.type	Journal Article
utslib.citation.volume	360	en_US
utslib.for	091207 Metals and Alloy Materials	en_US
utslib.for	0204 Condensed Matter Physics	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	0913 Mechanical Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CHT - Health Technologies
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	360	en_US

Abstract:

Anomalous magnetic viscosity, where the magnetization as a function of time exhibits non-monotonic behaviour, being seen to increase, reach a peak, and then decrease, is observed on recoil lines in bulk amorphous ferromagnets, for certain magnetic prehistories. A simple geometrical approach based on the motion of the state line on the Preisach plane gives a theoretical framework for interpreting non-monotonic behaviour and explains the origin of the peak. This approach gives an expression for the time taken to reach the peak as a function of the applied (or holding) field. The theory is applied to experimental data for bulk amorphous ferromagnet alloys of composition Nd60-xFe 30Al10Dyx, x = 0, 1, 2, 3 and 4, and it gives a reasonable description of the observed behaviour. The role played by other key magnetic parameters, such as the intrinsic coercivity and fluctuation field, is also discussed. When the non-monotonic behaviour of the magnetization of a number of alloys is viewed in the context of the model, features of universal behaviour emerge, that are independent of alloy composition. © 2014 Published by Elsevier B.V. All rights reserved.

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http://hdl.handle.net/10453/115637