Magnetisation of Thin Films Under Oblique Field Conditions

M. Mcdonnell, Robert Street, Rob Woodward, J.N. Chapman

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Magneto-optical measurements have been made of a single-layer film of TbFeCo and a multilayer Pt/Co film both with perpendicular anisotropy. Magnetising fields were applied at angles in the range theta = 0 degrees-60 degrees with respect to the film normal. Switching fields (H-sw) and the time dependence of magnetization were measured as functions of theta. Values of the magnetic viscosity parameter (Lambda) were determined from the time-dependent magnetization measurements. The angular variation of both H-sw and Lambda are given. The distributions of regions of reversed magnetization in the films have been examined by magnetic force microscopy (MFM) and Kerr effect microscopy. The fractal dimensions of these patterns have been determined. In the TbFeCo film the magnetization distributions and fractal dimension change significantly as the obliquity of the magnetising field changes. In contrast, the obliquity of the magnetising field has little effect on the characteristics of magnetised regions of the Pt/Co film. (C) 1998 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)1281-1282
JournalJournal of Magnetism and Magnetic Materials
Volume177 part 2
DOIs
Publication statusPublished - 1998

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