Effects of fluence and fluence rate of proton irradiation upon magnetism in Fe65Ni35 Invar alloy

Masafumi Matsushita, Hideki Wada, Yasushi Matsushima

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Abstract Curie temperature, TC, of the Fe-Ni Invar alloys increase due to irradiation with electron and some kinds of ions. In this study, proton irradiation effects upon magnetism in an Fe65Ni35 alloy have been investigated. It is found that the increment of TC, ΔTC, increases with increasing fluence. The magnetic hysteresis curve of the alloy was found to be unaffected by irradiation. Comparing ΔTC and the calculated energy transfer from the ions to the sample, it seemed that ΔTC was found to be related to the number of vacancies formed in nuclear collision events. In addition, ΔTC was influenced by the fluence rate, i.e., the deposited energy per unit time.

Original languageEnglish
Article number60323
Pages (from-to)491-495
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Publication statusPublished - Jul 20 2015


  • Curie temperature
  • Fe-Ni Invar alloy
  • Ferromagnetic alloy
  • Irradiation
  • Magnetization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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