• DocumentCode
    1385915
  • Title

    Magnetic anisotropy of the Fe-SiO2 and Fe20Ni 80-SiO2 granular solid measured using the magnetic relaxation method

  • Author

    Jian-Ping Wang ; De Hua Han ; Luo, He Lie ; Liu, B. ; Hu, S.B. ; Low, T.S.

  • Author_Institution
    Magnetic Technol. Center, Nat. Univ. of Singapore, Singapore
  • Volume
    32
  • Issue
    5
  • fYear
    1996
  • fDate
    9/1/1996 12:00:00 AM
  • Firstpage
    4496
  • Lastpage
    4498
  • Abstract
    A method was reported by which the effective anisotropy of the Fe-SiO2 and Fe20Ni80-SiO2 granular solid can be measured using the magnetic relaxation equations. The pure Fe-SiO2 and Fe20Ni80-SiO2 granular solid samples were fabricated using a sol-gel method in which the nanoscale bcc structure Fe and fcc structure Fe20Ni 80 particles are dispersed in the silica matrix. The average size of the metal particles in the two discussed Fe-SiO2 and Fe20Ni80-SiO2 granular solid samples are 10 nm and 8 nm, respectively. The obtained values of the effective magnetic anisotropy are in the order of the 106 erg/cm3 and almost independent with temperature from 80 K to 300 K for these granular solid samples. These values are far larger than the magnetocrystalline anisotropy for the bulk bcc structure Fe and fcc structure Fe20Ni80. The larger stress magnetic anisotropy may result in these larger magnetic anisotropy for these granular solid samples. It was found that the effective magnetic anisotropy of the Fe-SiO2 granular solid is larger than that of the Fe20Ni80-SiO2 granular solid, which may result from the larger stress anisotropy in Fe-SiO2 granular solid than in Fe20Ni80-SiO2 granular solid and the reason is discussed
  • Keywords
    Mossbauer effect; iron; iron alloys; magnetic anisotropy; magnetic particles; magnetic relaxation; nickel alloys; silicon compounds; 80 to 300 K; BCC structure; FCC structure; Fe-SiO2; Fe20Ni80-SiO2; Mossbauer spectra; effective anisotropy; effective magnetic anisotropy; granular solid; magnetisation relaxation; metal particles; single domain particles; sol-gel method; stress anisotropy; Anisotropic magnetoresistance; Equations; Iron; Magnetic anisotropy; Nanostructures; Perpendicular magnetic anisotropy; Silicon compounds; Solids; Stress; Temperature;
  • fLanguage
    English
  • Journal_Title
    Magnetics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9464
  • Type

    jour

  • DOI
    10.1109/20.538909
  • Filename
    538909
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1385915