J. Phys. IV France 08 (1998) Pr2-35-Pr2-38
The effect of annealing on the magnetic properties of glassy Fe71Zr7B2Cr20 alloysK.-S. Kim1, S.-C. Yu1, V. Ström2, A. Inoue3 and K.V. Rao2
1 Department of Physics, Chungbuk National University, Cheongju 360-763, Korea
2 Department of Condensed Matter Physics, Royal Institute of Technology, 10044 Stockholm, Sweden
3 Institute for Materials Research, Tohoku University, Sendai 380, Japan
We have studied the de-magnetization properties and the ac-suscetibility of as-quenched and annealed Fe71Zr7B2Cr20 alloys. With increasing temperature, magnetization increased first, reached a maximum value at around 30 K and then decreased. The increase of magnetization with increasing temperature at low temperature seems to be related with the competing interactions. The annealed sample shows much smaller elastic part of the succeptibility at low temperatures and decreases almost linearly with temperature up to the Tc of the samples. Especially for the sample annealed at the higher with temperature Tann = 657 °C, the situation shows a visually loss-less reversible magnetization process. The very broad and very high less-peak for the 10 Oe measurement clearly suggests that Hc of the material has been surpassed and the magnetization process is mainly irreversible.
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