DISACCOMMODATION OF INITIAL SUSCEPTIBILITY IN AMORPHOUS Fe_(90-x)Ni_xZr_(10) ALLOYS

Acta Metall Sin

1992, Vol. 28

Issue (3): 60-64 DOI:

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DISACCOMMODATION OF INITIAL SUSCEPTIBILITY IN AMORPHOUS Fe_(90-x)Ni_xZr_(10) ALLOYS

LI Yinfeng;GUO Huiqun;XU Rufeng;SHEN Baogen Laboratory of Magnetics; Institute of Physics; Academia Sinica; Beijing

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LI Yinfeng;GUO Huiqun;XU Rufeng;SHEN Baogen Laboratory of Magnetics; Institute of Physics; Academia Sinica; Beijing. DISACCOMMODATION OF INITIAL SUSCEPTIBILITY IN AMORPHOUS Fe_(90-x)Ni_xZr_(10) ALLOYS. Acta Metall Sin, 1992, 28(3): 60-64.

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Abstract The disaccommodation (DA) measurements of initial susceptibility were per-formed in amorphous Fe_(90-x)Ni_xZr_(10)(x=10, 20, 30) alloys. The DA was measured for two dif-ferent amorphous states: as--quenched and pretreated at 537 K for 45 min. For all theas--quenched samples, in the isochronal spectra of DA a well defined relaxation peak around350 K is accompanied by a small but distinct peak near the Curie temperature of Fe_(90)Zr_(10) Phase(T_c=230 K). The reversibility and annealing effect on DA are analyzed within the framework oftwo--level model. The fits of the theory to the experimental data of reversible relaxation pro-cesses gave a spectrum of activation energies and pre--exponential factor.

Key words: amorphous alloy disaccommodation Activation energy spectrum

Received: 18 March 1992

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