Phase separation in Nd[sub 60-x]Y[sub x]Fe[sub 30]Al[sub 10] melt-spun ribbons

Sun, Z. G.; Lo¨ser, W.; Eckert, J.; Mu¨ller, K.-H.; Schultz, L.
February 2002
Applied Physics Letters;2/4/2002, Vol. 80 Issue 5, p772
Academic Journal
The structure of melt-spun Nd[sub 60-x]Y[sub x]Fe[sub 30]Al[sub 10] (x=0, 10, and 30) ribbons has been investigated by x-ray diffraction, isochronal differential scanning calorimetry (DSC), isothermal DSC, and thermomagnetic measurements. Precipitation of nanocrystalline Nd embedded in an amorphous matrix is found upon quenching. The amorphous phase further separates into Fe-rich regions and Fe-depleted regions. The growth of Nd nanocrystals upon annealing was identified by the characteristic isothermal calorimetric signal. The Fe-depleted amorphous phase crystallizes at 580 K, while the Fe-rich amorphous phase crystallizes at about 740, 779, and 750 K for x=0, 10, and 30, respectively. Phase separation in the amorphous matrix is also revealed by the thermomagnetic measurements, which show ferromagnetic transitions at about 60 and 480 K. © 2002 American Institute of Physics.


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