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Physical and Magnetic Modification of Co/Pt Multilayers by Ion Irradiation

Published online by Cambridge University Press:  09 January 2003

G.J. Kusinski  and
G. Thomas
G.J. Kusinski
Affiliation:
Department of Materials Science and Engineering, University of California at Berkeley, Berkeley, CA 94720, USA National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA MMFX Technologies, Irvine, CA 92612, USA
G. Thomas
Affiliation:
Department of Materials Science and Engineering, University of California at Berkeley, Berkeley, CA 94720, USA MMFX Technologies, Irvine, CA 92612, USA G. Thomas is currently at MMFX Technologies, 2 Corporate Park, Suite 102, Irvine, CA 92606
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Abstract

The microstructure of Co/Pt multilayers with large perpendicular magnetic anisotropy (PMA) was investigated before and after energetic ion irradiation. No pronounced microstructural changes were detected at ion doses sufficient to completely reduce the PMA and cause a spin reorientation transition to in-plane. Ion-induced displacement of Co and Pt atoms near Co/Pt interfaces lead to local “roughening” and Co layer strain relaxation, reducing the PMA. The magnetic domain confinement induced by ion irradiation and magnetic patterning by selective ion irradiation were also investigated.

Keywords

magnetic patterningion irradiationCo/Pt multilayersmagnetic imagingmagnetic domainstransmission electron microscopytransmission X-ray microscopy
Type
A SYMPOSIUM IN HONOR OF PROFESSOR GARETH THOMAS
Information
Microscopy and Microanalysis , Volume 8 , Issue 4 , August 2002 , pp. 319 - 332
Copyright
2002 Microscopy Society of America

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