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Nanocrystalline iron based-alloys

E. BURZO1,* , C. DJEGA-MARIADASSOU2

Affiliation

  1. Faculty of Physics, Babes-Bolyai University 400084 Cluj-Napoca, Romania
  2. LCMTR UPR 209 CNRS 2/8 Bat. F RueHenry Dunant 94320 Thiais, France

Abstract

The magnetic properties of nanocrystalline Sm2Fe17-xSixC2 alloys were studied in the temperature range 4.2-800 K and fields up to 10 T. The saturation magnetizations are little higher than in noncarbonated systems having the same composition. The Γ = dlnTc/dlnv values show linear dependences on the Curie temperature, Tc, suggesting that iron moments are mainly localized. The γ=dlnJeff/dlnv=16.4, a value close to that determined in highly carbonated R2Fe17Cx polycrystalline compounds where R is a rare-earth or yttrium. Band structure calculations show linear dependences of Fe moments, as well as of R5d band polarizations on De Gennes factor. The magnetic properties of Nd6Fe88-xMxB6 nanocomposites with M=V or Fe were also studied. Remanent inductions Br = (0.62-0.67) were obtained..

Keywords

Nanocrystalline alloys, Crystal structures, Magnetic properties.

Submitted at: Nov. 14, 2006
Accepted at: June 15, 2007

Citation

E. BURZO, C. DJEGA-MARIADASSOU, Nanocrystalline iron based-alloys, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 6, pp. 1757-1761 (2007)