Nanostructuring and Texturing for Improved Magnetic Materials

David J. Sellmyer; Y. Liu; T. A. George

doi:10.1002/9781118365038.ch45

Nanostructuring and Texturing for Improved Magnetic Materials

David J. Sellmyer, Y. Liu, T. A. George

Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Chapter

Abstract

The concept of achieving a useful high-energy-product magnet through appropriate nanostructuring of known hard and soft phases has been tantalizing researchers since the idea was first proposed. The fabrication of exchange-coupled nanocomposite magnets faces several challenges including aligning the easy anisotropy axes of the hard-phase grains. Here we investigate experimentally two-phase nanostructures of hard Ll₀-ordered FePt and soft iron-rich fee Fe(Pt). The Fe-Pt thin films were produced by epitaxial cosputtering onto MgO (001) single-crystal substrates which lead to strong (001) texturing. The measured hysteresis loops indicate nearly ideal exchange coupling. Excellent magnetic properties are obtained, with largest values of coercivity (51 kOe), saturationmagnetization (1287 emu/ cm³, J_s = 16.2 kG), and nominal maximum energy product (58 MGOe).

Original language	English (US)
Title of host publication	Energy Technology 2012
Subtitle of host publication	Carbon Dioxide Management and Other Technologies
Publisher	John Wiley and Sons
Pages	393-401
Number of pages	9
ISBN (Print)	9781118291382
DOIs	https://doi.org/10.1002/9781118365038.ch45
State	Published - May 15 2012

Keywords

Magnetic Materials
Nanoindentation
Transmission Electron Microscopy

ASJC Scopus subject areas

Materials Science(all)

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10.1002/9781118365038.ch45

Cite this

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title = "Nanostructuring and Texturing for Improved Magnetic Materials",

abstract = "The concept of achieving a useful high-energy-product magnet through appropriate nanostructuring of known hard and soft phases has been tantalizing researchers since the idea was first proposed. The fabrication of exchange-coupled nanocomposite magnets faces several challenges including aligning the easy anisotropy axes of the hard-phase grains. Here we investigate experimentally two-phase nanostructures of hard Ll0-ordered FePt and soft iron-rich fee Fe(Pt). The Fe-Pt thin films were produced by epitaxial cosputtering onto MgO (001) single-crystal substrates which lead to strong (001) texturing. The measured hysteresis loops indicate nearly ideal exchange coupling. Excellent magnetic properties are obtained, with largest values of coercivity (51 kOe), saturationmagnetization (1287 emu/ cm3, Js = 16.2 kG), and nominal maximum energy product (58 MGOe).",

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AU - Sellmyer, David J.

AU - Liu, Y.

AU - George, T. A.

PY - 2012/5/15

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N2 - The concept of achieving a useful high-energy-product magnet through appropriate nanostructuring of known hard and soft phases has been tantalizing researchers since the idea was first proposed. The fabrication of exchange-coupled nanocomposite magnets faces several challenges including aligning the easy anisotropy axes of the hard-phase grains. Here we investigate experimentally two-phase nanostructures of hard Ll0-ordered FePt and soft iron-rich fee Fe(Pt). The Fe-Pt thin films were produced by epitaxial cosputtering onto MgO (001) single-crystal substrates which lead to strong (001) texturing. The measured hysteresis loops indicate nearly ideal exchange coupling. Excellent magnetic properties are obtained, with largest values of coercivity (51 kOe), saturationmagnetization (1287 emu/ cm3, Js = 16.2 kG), and nominal maximum energy product (58 MGOe).

AB - The concept of achieving a useful high-energy-product magnet through appropriate nanostructuring of known hard and soft phases has been tantalizing researchers since the idea was first proposed. The fabrication of exchange-coupled nanocomposite magnets faces several challenges including aligning the easy anisotropy axes of the hard-phase grains. Here we investigate experimentally two-phase nanostructures of hard Ll0-ordered FePt and soft iron-rich fee Fe(Pt). The Fe-Pt thin films were produced by epitaxial cosputtering onto MgO (001) single-crystal substrates which lead to strong (001) texturing. The measured hysteresis loops indicate nearly ideal exchange coupling. Excellent magnetic properties are obtained, with largest values of coercivity (51 kOe), saturationmagnetization (1287 emu/ cm3, Js = 16.2 kG), and nominal maximum energy product (58 MGOe).

KW - Magnetic Materials

KW - Nanoindentation

KW - Transmission Electron Microscopy

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SP - 393

EP - 401

BT - Energy Technology 2012

PB - John Wiley and Sons

ER -

Nanostructuring and Texturing for Improved Magnetic Materials

Abstract

Keywords

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