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Investigations on the Magnetic Properties of High-Coercivity (Nd1−xFex)90Al10 Bulk Amorphous Alloys

Published online by Cambridge University Press:  21 March 2011

N. Lupu ,
H. Chiriac ,
A. Takeuchi  and
A. Inoue
N. Lupu
Affiliation:
National Institute of Research and Development for Technical Physics, 47 Mangeron. Blvd., Iasi, RO 6600, Romania
H. Chiriac
Affiliation:
National Institute of Research and Development for Technical Physics, 47 Mangeron. Blvd., Iasi, RO 6600, Romania
A. Takeuchi
Affiliation:
Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-Ku, Sendai 980-8577, Japan
A. Inoue
Affiliation:
Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-Ku, Sendai 980-8577, Japan
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Abstract

Bulk rods with diameters up to 3 mm prepared by suction casting and respectively mould casting and melt-spun amorphous ribbons with thicknesses in the range 25 – 150 μm with compositions Nd90−xFexAl10 (x = 35; 40; 45; 50) were investigated by XRD, DSC and magnetic measurements in the temperature range 5 – 600 K. The microstructure and magnetic properties are strongly dependent on the cooling rate, preparation process and Fe content. The large values of the coercive field, which amount to 320 kA/m in the as-cast state as well as the increase with decrease of the temperature and cooling rate result from the formation of very small metastable or nonequilibrium magnetic clusters.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 674: Symposia T/U/V – Applications of Ferromagnetic and Optical Materials, Storage and Magnetoelectronics , 2001 , U2.7
Copyright
Copyright © Materials Research Society 2001

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References

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