NDLI: Co-Fe metal/native-oxide multilayers: a new direction in soft magnetic thin film design II. Microscopic characteristics and interactions

Content Provider	IEEE Xplore Digital Library
Author	Beach, G.S.D. Berkowitz, A.E.
Copyright Year	1965
Abstract	Co/sub x/Fe/sub 100-x/ metal/native-oxide multilayer (MNOM) films exhibit soft magnetic properties, large magnetization, high resistivity, and a potential operating bandwidth of several gigahertz. These attractive characteristics are facilitated by ultrathin magnetic native oxide layers introduced to provide a high-resistivity barrier between nanocrystalline metal layers while preserving interlayer coupling and contributing to the net moment. This paper addresses several important features of the MNOM system from a microscopic perspective. The uniaxial anisotropy of MNOM thin films is discussed in detail and "exchange averaging" is invoked to account for its vanishingly small effective dispersion. The role of the native oxide in establishing interlayer exchange coupling is demonstrated, and a detailed account of the nature of the oxide is presented. In the Fe MNOM system, the oxide is shown to have a volume-averaged magnetization of 732(35) emu/cm/sup 3/, with a temperature dependence comparable to that of metallic Fe. The magnetism of this largely "interfacial" oxide is supported by the metal and collapses in the absence of the metal. The oxide retains a large net moment for Co fractions up to at least x=50, but oxide magnetism is lost at high Co fractions, coinciding with the loss of soft magnetic properties.
Sponsorship	IEEE Magnetics Society
Starting Page	2053
Ending Page	2063
Page Count	11
File Size	519576
File Format	PDF
ISSN	00189464
Volume Number	41
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic multilayers Magnetic films Magnetic force microscopy Iron Magnetic anisotropy Perpendicular magnetic anisotropy Soft magnetic materials Magnetic properties Magnetization Conductivity soft magnetic materials magnetic recording magnetic shielding magnetodynamics permeability
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Co-Fe metal/native-oxide multilayers: a new direction in soft magnetic thin film design I. Quasi-static properties and dynamic response

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Co-Fe metal/native-oxide multilayers: a new direction in soft magnetic thin film design II. Microscopic characteristics and interactions

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