Effect of 50-keV proton irradiation on the magnetism of a Fe 66Ni34 Invar alloy

M. Matsushita, Y. Matsushima, T. Uruga, R. Ishigami, A. Iwase

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


The magnetism of Fe-Ni Invar alloys is very sensitive to the lattice constant, stress, and the number of nearest-neighbor Fe-Fe atomic pairs. Ion irradiation is a useful tool to alter the local atomic structure of a given material. Therefore, the effects of low-energy and light-ion irradiation on the magnetism of a Fe66Ni34 Invar alloy were investigated in this study. The Fe66Ni34 Invar alloy was irradiated with 50-keV protons at a fluence of 1×1015 ions/cm2 at room temperature. The Curie temperature was found to increase from 465 K (before irradiation) to 535 K (after irradiation). The X-ray absorption analysis of the fine structure of the alloy revealed that irradiation had no effect on the atomic structures surrounding Fe and Ni.

Original languageEnglish
Pages (from-to)13-17
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Publication statusPublished - May 2013


  • Curie temperature
  • Fe-Ni
  • Invar alloy
  • Ion irradiation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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