Effect of external magnetic field on valence-electron structures of Fe and Ni in Invar, Permalloy and the other Fe-Ni alloys by using K beta-to-K alpha X-ray intensity ratios

Alim B., Han I., DEMİR L.

APPLIED RADIATION AND ISOTOPES, cilt.112, ss.5-12, 2016 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 112
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1016/j.apradiso.2016.03.001
  • Dergi Adı: APPLIED RADIATION AND ISOTOPES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.5-12
  • Anahtar Kelimeler: Fe-Ni alloy, Valence electron structure, Magnetic field, K beta-to-K alpha X-ray intensity ratio, SUBSHELL FLUORESCENCE YIELDS, CHARGE-TRANSFER, CROSS-SECTIONS, CR, CO, ELEMENTS, TI, NIXFE1-X, MN
  • Atatürk Üniversitesi Adresli: Evet

Özet

The effect of external magnetic field on the valence-electron structures of Fe and Ni in various Fe-Ni alloy compositions was investigated by using X-ray fluorescence spectroscopy. Firstly, K beta-to-K alpha X-ray intensity ratios of Fe and Ni in Invar (Fe0.64Ni0.36), Permalloy (Fe0.20Ni0.80) and FexNi1-x (x=0, 0.40, 0.52, 0.55, 0.61, and 1) alloys were measured without any magnetic field and under 0.5 and 1 T external magnetic fields, separately. Later, the valence-electron structures of Fe and Ni in both pure form and alloys were obtained by comparison of measured X-ray intensity ratios with the results of multi-configurations Dirac-Fock (MCDF) calculations. The results obtained for valence-electron structures of Fe and Ni in various Fe-Ni alloys were evaluated in terms of magnetic field effect, delocalization and/or charge transfer phenomena. The results have shown that valence electron structure of Fe and Ni in Fe-Ni alloys are dependent on both external magnetic field and concentration of alloy elements. (C) 2016 Elsevier Ltd. All rights reserved.