Onset of ferromagnetism in pseudobinary FCC (Fe1-xNix)92C8alloys. I. Magnetic phase diagram

Abstract
The magnetic phase diagram of pseudobinary FCC (Fe1-xNix)92C8 alloys (0.1<or=x<or=0.4) fabricated by rapid quenching has been investigated by static magnetisation, AC susceptibility and Mossbauer effect. The Pauli-type paramagnetism is found at x=0.1 and the spin glass is at 0.1<x<0.2. At 0.2<or=xor=0.25. The onset of ferromagnetism is discussed in connection with the lattice expansion due to an interstitial carbon and with the effective charge transfer from C to Fe. The magnetic phase diagram as well as the dependence of Fe magnetic moment on x is explained by the environmental effect.

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