Lorentz microscopy has been used to study the micromagnetic processes occurring during the reversal of multiscale permalloy elements. The elements, which have similar dimensions to write heads used in magnetic recording, typically have length scales varying from in the element “core” down to in the element “tip.” A discussion of the effect of varying the geometry and critical dimensions of the elements on the reversal behavior and switching fields is presented. While the magnetization processes in the core tend to be similar to what is observed in the absence of a tip, the presence of the core strongly influences the tip reversal, even for tips with widths of . The results demonstrate clearly the role played by shape anisotropy in complex shaped elements fabricated from an isotropic magnetic film.
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1 July 2007
Research Article|
July 06 2007
Micromagnetic reversal behavior of multiscale permalloy elements
B. R. Craig;
B. R. Craig
a)
Department of Physics and Astronomy,
University of Glasgow
, Glasgow G12 8QQ, United Kingdom
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S. McVitie;
S. McVitie
Department of Physics and Astronomy,
University of Glasgow
, Glasgow G12 8QQ, United Kingdom
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J. N. Chapman;
J. N. Chapman
Department of Physics and Astronomy,
University of Glasgow
, Glasgow G12 8QQ, United Kingdom
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D. O. O’Donnell;
D. O. O’Donnell
Seagate Technology (Ireland)
, 1 Disc Drive, Springtown Industrial Estate, Derry BT48 0BF, United Kingdom
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A. B. Johnston
A. B. Johnston
Seagate Technology (Ireland)
, 1 Disc Drive, Springtown Industrial Estate, Derry BT48 0BF, United Kingdom
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a)
Present address: Seagate Technology (Ireland), 1 Disc Drive, Springtown Industrial Estate, Derry BT48 0BF, UK; electronic mail: beverley.craig@seagate.com
J. Appl. Phys. 102, 013911 (2007)
Article history
Received:
April 19 2007
Accepted:
May 24 2007
Citation
B. R. Craig, S. McVitie, J. N. Chapman, D. O. O’Donnell, A. B. Johnston; Micromagnetic reversal behavior of multiscale permalloy elements. J. Appl. Phys. 1 July 2007; 102 (1): 013911. https://doi.org/10.1063/1.2752151
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