57Fe Mössbauer study of the interstitial nitrogen atom effects of NdFe10.5V1.5Nx

Jinbo Yang, Weihua Mao, Yingchang Yang, Zhenjie Zhao, Fashen Li

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Abstract

Magnetic and 57Fe Mössbauer spectra measurements were carried out to study the interstitial nitrogen atom effects in the NdFe 10.5V1.5Nx (0≤x≤2.1) compounds. It is found that saturation magnetization, magnetocrystalline anisotropy, hyperfine fields, and isomer shifts of NdFe10.5V1.5Nx are strongly enhanced upon nitrogenation, due to magneto-volume effects and chemical bonding effects of nitrogen atoms. On the basis of the variation of isomer shifts and hyperfine fields as a function of nitrogen concentration, and by using a set of phenomenological formulas, the contributions of magneto-volume effect and the chemical bonding effect to the hyperfine parameters are successfully separated. The pure magneto-volume effect and the chemical bonding effect of the nitrogen atoms will give a positive contribution to the average hyperfine fields and isomer shifts of the Fe atoms in the NdFe 10.5V1.5Nx nitrides.

Original languageEnglish (US)
Pages (from-to)6923-6925
Number of pages3
JournalJournal of Applied Physics
Volume83
Issue number11
DOIs
StatePublished - Jan 1 1998

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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