Magnetic moment of α″-Fe16N2 films (invited)

Migaku Takahashi, H. Shoji, H. Takahashi, H. Nashi, T. Wakiyama, M. Doi, M. Matsui

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    117 Citations (Scopus)

    Abstract

    In order to determine the value of the intrinsic magnetic moment of the α] phase, the films of nitrogen-martensite with various N content were fabricated under various reactive sputtering conditions. The magnetic moment of (α] +α')-Fe16N2 films is discussed in connection with the change of the unit-cell volume of the bct structure and the degree of N site ordering in nitrogen-martensite. As a result, it is found that (1) the same structure as bulk α] -Fe16N2 is realized in the present films, (2) the saturation magnetization σs of the α' phase increases about 4% with increasing unit-cell volume of the α' phase, (3) the degree of N site ordering from α' to α] -Fe16N2 does not much affect σs, and (4) the experimentally obtained maximum value of σs for the (α] +α')-Fe16N2 film was 232 emu/g. The intrinsic value of σs in the α] phase (in the perfectly ordered state) is proposed to be no more than 240 emu/g at 300 K.

    Original languageEnglish
    Pages (from-to)6642-6647
    Number of pages6
    JournalJournal of Applied Physics
    Volume76
    Issue number10
    DOIs
    Publication statusPublished - 1994

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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