Hyperfine Interactions

, Volume 160, Issue 1–4, pp 107–121 | Cite as

Xenon-ion Induced Magnetic and Structural Modifications of Ferromagnetic Alloys

  • Ratnesh Gupta
  • K. P. Lieb
  • G. A. Müller
  • P. Schaaf
  • K. Zhang
Article
First Online:

Abstract

Thin polycrystalline films of permalloy (Ni79Fe21) and permendur (Co50Fe50) have been irradiated with Xe-ions to fluences of 1014–1016 ions/cm2. Ion-induced structural and magnetic modifications have been measured by grazing angle X-ray diffraction, Rutherford backscattering and magneto-optical Kerr effect. In the case of permendur, the Xe-ion implantation first reduced the coercivity, because of stress relaxation, while higher ion fluences increased the coercivity due to pinning centers generated in the film. The ion irradiation aligned the in-plane easy axis of the magnetization along the direction of the external magnetic field during implantation. Phase shifts obtained from magnetic force microscopy confirmed these modifications. The effects of Xe-ion irradiation in permalloy films are much weaker and underline the importance of magnetostriction in the variation of the coercivity and anisotropy.

PACS

61.80 Jh 76.80+y 75.50.Bb 
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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • Ratnesh Gupta
    • 1
    • 2
  • K. P. Lieb
    • 1
  • G. A. Müller
    • 1
  • P. Schaaf
    • 1
  • K. Zhang
    • 1
  1. 1.II. Physikalisches InstitutUniversität GöttingenGöttingenGermany
  2. 2.School of InstrumentationDevi Ahilya UniversityIndoreIndia

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