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Soft magnetic properties of Fe-TM-C-N (TM:Zr,Nb) nanocrystalline films

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6 Author(s)
Ryu, H.J. ; Dept. of Metall. Eng., Seoul Nat. Univ., South Korea ; Lee, J.J. ; Han, S.H. ; Kim, H.J.
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Soft magnetic properties of Fe-TM-C-N (TM:Zr,Nb) films, fabricated by RF reactive sputtering in Ar+N2 atmosphere, were investigated. The as-deposited films having mixed phases of amorphous and α-Fe or mostly crystalline α-Fe phase showed nanocrystalline structure upon annealing. The best soft magnetic properties achieved in these films are; Hc of 0.06 Oe, μ eff 2750 (1 MHz) and 4 πMs, of 16.8 kG in Fe-Zr-C-N film and Hc of 0.31 Oe, μeff of 2100 (1 MHz) and 4 πMs of 15.5 kG in Fe-Nb-C-N film. The fine grained α-Fe structure, together with very fine TM(C,N) precipitates which were formed at an early stage of crystallization, is considered to be one of the main factors for the excellent soft magnetic properties. The Fe-Zr-C-N films exhibit better soft magnetic properties than those of the Fe-Nb-C-N films, which is considered to be due to the magnitude of the formation enthalpy

Published in:

Magnetics, IEEE Transactions on  (Volume:31 ,  Issue: 6 )

Date of Publication:

Nov 1995

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