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Journal of Applied Physics / Volume 111 / Issue 7 / PROCEEDINGS OF THE 56TH ANNUAL CONFERENCE ON MAGNETISM AND MAGNETIC MATERIALS / Soft Magnetic Materials

J. Appl. Phys. 111, 07A307 (2012); http://dx.doi.org/10.1063/1.3670977 (3 pages)

Bulk nanocomposite using self-forming core/shell nanoparticles and its magnetic properties for high-frequency applications

Tomohiro Suetsuna, Koichi Harada, Toshihide Takahashi, and Seiichi Suenaga

Functional Materials Laboratory, Corporate Research & Development Center, Toshiba Corporation, Kawasaki, Kanagawa 212-8582, Japan

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(Received 22 September 2011; accepted 14 October 2011; published online 10 February 2012)

A bulk nanocomposite composed of tightly packed self-forming core/shell nanoparticles of metal/oxide was fabricated. The crystalline grain size of the nanoparticles, the packing ratio, and the composition were controlled in the nanocomposite, and their effects on the magnetic properties were investigated. The crystalline grain size of the nanoparticles, the packing ratio, and the composition strongly influenced the magnetic anisotropy field, magnetic coercivity, relative permeability, and loss factor at GHz bands. High permeability with a low loss factor of less than 1.5% at up to 1 GHz was obtained in the nanocomposite in which the nanoparticles with a crystalline grain size of approximately 15 nm were tightly packed.

© 2012 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL PROCEDURE
  3. RESULTS AND DISCUSSION
  4. CONCLUSION

KEYWORDS, PACS, and IPC

Keywords

coercive force, grain size, magnetic anisotropy, magnetic leakage, magnetic permeability, nanocomposites, nanofabrication, nanomagnetics, nanoparticles

PACS

  • 75.75.Cd

    Fabrication of magnetic nanostructures

  • 75.30.Gw

    Magnetic anisotropy

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

  • 81.16.-c

    Methods of micro- and nanofabrication and processing

  • 61.46.Df

    Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots)

International Patent Classification (IPC)

  • B82B1/00

    Nano-structures

  • B82B3/00

    Manufacture or treatment of nano-structures

  • H01F1/00

    Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3670977

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    M. Saidani and M. A. Gijs, Appl. Phys. Lett. 84 (22), 4496 (2004)APPLAB000084000022004496000001.

    T. Suetsuna, S. Suenaga, K. Harada, and M. Tomimatsu, J. Appl. Phys. 106, 084321 (2009)JAPIAU000106000008084321000001.

    Z. Turgut, N. T. Nuhfer, H. R. Piehler, and M. E. McHenry, J. Appl. Phys. 85, 4406 (1999)JAPIAU000085000008004406000001.

    J. H. J. Scott, K. Chowdary, Z. Turgut, S. A. Majetich, and M. E. McHenry, J. Appl. Phys. 85, 4409 (1999)JAPIAU000085000008004409000001.

    F. Bødker, S. Mørup, and S. Linderoth, Phys. Rev. Lett. 72, 282 (1994).


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