High energy products in exchange-coupled nanocomposite films

J. P. Liu; Y. Liu; R. Skomski; D. J. Sellmyer

doi:10.1109/20.800486

High energy products in exchange-coupled nanocomposite films

J. P. Liu, Y. Liu, R. Skomski, D. J. Sellmyer

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

Several systems of nanocomposlte thin films have been prepared by plasma sputtering and heat treatment. By choosing suitable multilayer structures of the as-deposited films and subsequent heat-treatment processes, the nanostructures of the films have been tailored. The thermal processing is the key to control the morphology. Appropriate heat-treatment processes have been found for the systems studied, which result in the desired nanostructures. For the first time a nearly ideal nanostructure with the soft-phase grains embedded homogeneously in the hard phase grains has been obtained for the FePt-Fe_1-xPt_x(x-0.3) system. Effective intergrain exchange coupling has been realized. As a consequence, high energy products up to 50 MGOe have been achieved.

Original language	English (US)
Pages (from-to)	3241-3246
Number of pages	6
Journal	IEEE Transactions on Magnetics
Volume	35
Issue number	5 PART 2
DOIs	https://doi.org/10.1109/20.800486
State	Published - 1999

Keywords

Exchange coupling
Heat treatment
Permanent magnets
Thin films

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/20.800486

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title = "High energy products in exchange-coupled nanocomposite films",

abstract = "Several systems of nanocomposlte thin films have been prepared by plasma sputtering and heat treatment. By choosing suitable multilayer structures of the as-deposited films and subsequent heat-treatment processes, the nanostructures of the films have been tailored. The thermal processing is the key to control the morphology. Appropriate heat-treatment processes have been found for the systems studied, which result in the desired nanostructures. For the first time a nearly ideal nanostructure with the soft-phase grains embedded homogeneously in the hard phase grains has been obtained for the FePt-Fe1-xPtx(x-0.3) system. Effective intergrain exchange coupling has been realized. As a consequence, high energy products up to 50 MGOe have been achieved.",

keywords = "Exchange coupling, Heat treatment, Permanent magnets, Thin films",

author = "Liu, {J. P.} and Y. Liu and R. Skomski and Sellmyer, {D. J.}",

note = "Funding Information: Manuscript received Februay 28, 1999. J. P. Liu, 402-472-2682, fan 402-472-2879, pliu~onlinfo.unl.cdn. Research supported by the AFOSR (F49620-98-1-0098), J.P.L., R.S. and D.J.S. are also supported in part by the US DOE (DE-F6-02- 86ER45262), DAPPA through ARO (DAAG-55-98-1-0268)a, nd NSF (INT-9812082).",

year = "1999",

doi = "10.1109/20.800486",

language = "English (US)",

volume = "35",

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publisher = "Institute of Electrical and Electronics Engineers Inc.",

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AU - Liu, J. P.

AU - Liu, Y.

AU - Skomski, R.

AU - Sellmyer, D. J.

N1 - Funding Information: Manuscript received Februay 28, 1999. J. P. Liu, 402-472-2682, fan 402-472-2879, pliu~onlinfo.unl.cdn. Research supported by the AFOSR (F49620-98-1-0098), J.P.L., R.S. and D.J.S. are also supported in part by the US DOE (DE-F6-02- 86ER45262), DAPPA through ARO (DAAG-55-98-1-0268)a, nd NSF (INT-9812082).

PY - 1999

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N2 - Several systems of nanocomposlte thin films have been prepared by plasma sputtering and heat treatment. By choosing suitable multilayer structures of the as-deposited films and subsequent heat-treatment processes, the nanostructures of the films have been tailored. The thermal processing is the key to control the morphology. Appropriate heat-treatment processes have been found for the systems studied, which result in the desired nanostructures. For the first time a nearly ideal nanostructure with the soft-phase grains embedded homogeneously in the hard phase grains has been obtained for the FePt-Fe1-xPtx(x-0.3) system. Effective intergrain exchange coupling has been realized. As a consequence, high energy products up to 50 MGOe have been achieved.

AB - Several systems of nanocomposlte thin films have been prepared by plasma sputtering and heat treatment. By choosing suitable multilayer structures of the as-deposited films and subsequent heat-treatment processes, the nanostructures of the films have been tailored. The thermal processing is the key to control the morphology. Appropriate heat-treatment processes have been found for the systems studied, which result in the desired nanostructures. For the first time a nearly ideal nanostructure with the soft-phase grains embedded homogeneously in the hard phase grains has been obtained for the FePt-Fe1-xPtx(x-0.3) system. Effective intergrain exchange coupling has been realized. As a consequence, high energy products up to 50 MGOe have been achieved.

KW - Exchange coupling

KW - Heat treatment

KW - Permanent magnets

KW - Thin films

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