Magnetic properties of weak itinerant ferromagnetic ζ-Fe2N film

Hiroshi Naganuma, Yasushi Endo, Ryoichi Nakatani, Yoshio Kawamura, Masahiko Yamamoto

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We have studied magnetic properties of ζ-Fe2N film deposited onto surface-oxidized Si (100) substrates by reactive dc magnetron sputtering with an argon-nitrogen atmosphere. At the temperature less than 120 K, the magnetic moment of the 120 nm-thick ζ-Fe2N film is hard to be saturated at magnetic fields up to 50kOe, and the magnetic moment is weak. The inverse susceptibility linearly increases as the temperature increases between 65 and 160 K, and the change of the inverse susceptibility obeys the Curie-Weiss law. From the results of magnetization measurements, the magnetic parameter of the Curie temperature, the spontaneous magnetic moment at 0 K and the effective magnetic moment can be estimated to be 35±2.5 K, 0.028μB/iron atom and 0.70μB/iron atom, respectively. These parameters suggest that the ζ-Fe2N film is in the weak itinerant electron ferromagnetic state. These parameters can be also explained by self-consistently renormalization (SCR) theory.

Original languageEnglish
Pages (from-to)83-87
Number of pages5
JournalScience and Technology of Advanced Materials
Volume5
Issue number1-2
DOIs
Publication statusPublished - 2004 Jan 1
Externally publishedYes

Keywords

  • Curie temperature
  • Inverse susceptibility
  • Magnetic moment
  • Self-consistently renormalization (SCR) theory
  • Spin fluctuation
  • ζ-FeN film

ASJC Scopus subject areas

  • Materials Science(all)

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