NDLI: Thickness-Dependent Perpendicular Magnetic Anisotropy of CoPt Top Layer on CoPt/AlN Multilayer

Content Provider	IEEE Xplore Digital Library
Author	Youxing Yu Ji Shi Nakamura, Y.
Copyright Year	1965
Abstract	The magnetic anisotropy of the CoPt top layer on a CoPt/AlN multilayer has been studied. The layered structures were sputter deposited on fused quartz substrates and subsequently annealed at 500 C in a vacuum. CoPt layers are of a disordered fcc structure and highly (111) textured. It has been found that the CoPt top layer is perpendicular magnetic anisotropic and shows an enhanced coercivity in comparison with the bottom CoPt/AlN multilayer. A critical (maximum) thickness of 6 nm is found for the perpendicular anisotropy in the CoPt top layer. The structural results indicate that the CoPt top layer has experienced a tensile strain under a certain thickness. However, when the thickness of the CoPt top layer is above 6 nm, the inplane CoPt lattice parameter begins to decrease as the thickness increases, indicating that the CoPt top layer cannot tolerate the elastic energy and shrinks to release this energy. The simultaneous changes of the magnetic anisotropy and the inplane lattice parameter with the thickness strongly suggest that the thickness-dependent magnetic anisotropy of the CoPt top layer is correlated with the elastic strain through the magnetoelastic effect.
Sponsorship	IEEE Magnetics Society
Starting Page	1663
Ending Page	1666
Page Count	4
File Size	1096608
File Format	PDF
ISSN	00189464
Volume Number	46
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Perpendicular magnetic anisotropy Magnetic multilayers Magnetic anisotropy Anisotropic magnetoresistance Lattices Annealing Coercive force Tensile strain Magnetic field induced strain Magnetoelasticity perpendicular magnetic anisotropy Disordered fcc CoPt enhanced coercivity magnetoelastic effect
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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