A. MARIČIĆ¹, M. SPASOJEVIĆ¹, L. RIBIĆ-ZELENOVIĆ¹, N. MITROVIĆ¹

Abstract

Structural changes in the Fe81B13Si4C2 amorphous alloy during annealing were established using differential scanning calorimetry and X-ray analysis. The alloy is stable up to 200oC. Structural relaxation occurs in the temperature interval 200-400oC resulting in short term structural ordering. Nanocrystals of the a-Fe phase form from very unordered clusters in the alloy matrix. The effect of these structural changes on magnetic and electric properties of this alloy was established. After relaxation the magnetic permeability is higher for about 18% due to the increase of mobility of magnetic domain walls and better domain directionality. At temperatures above 310oC the magnetic permeability first gradually and then rapidly decreases with temperature growth to zero value at the Curie temperature. With the increase in participation of the crystal phase in the alloy the Curie temperature increases from 410 to 590oC. In the temperature interval from 500 to 560oC crystallization occurs leading to a rapid decrease of electrical resistance. Therefore, at room temperature the crystallized alloy has a magnetic permeability about 55% lower than the as quenched amorphous alloy..

Keywords

Amorphous, Ribbon, Magnetic permeability, Electrical resistance.

Submitted at: July 10, 2009
Accepted at: Aug. 7, 2009

Citation

A. MARIČIĆ, M. SPASOJEVIĆ, L. RIBIĆ-ZELENOVIĆ, N. MITROVIĆ, Effect of structural changes during annealing on the electric and magnetic properties of Fe81B13Si4C2 amorphous alloy, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 8, pp. 1088-1093 (2009)

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