| NUKLEONIKA 2013, 58(1):105-108
STRUCTURAL AND MAGNETIC PROPERTIES OF THE AS-CAST Nd10Fe83Zr1B6 RIBBONS, STUDIED BY X-RAY DIFFRACTION
AND MOSSBAUER SPECTROSCOPY
Agnieszka Ceglarek, Danuta Płusa, Piotr Pawlik, Piotr Gębara
Technical University of Częstochowa, Institute of Physics,
19 Armii Krajowej Ave., 42-200 Częstochowa, Poland
The Nd10Fe83Zr1B6 alloy ribbons, prepared by melt-spinning technique, have been investigated by X-ray diffraction (XRD) and Mössbauer spectroscopy. Magnetic properties were studied by Faraday balance and vibrating sample magnetometry (VSM). The ribbon samples were produced at various surface velocities of the copper wheel from 10 m/s to 20 m/s. The XRD and Mössbauer spectra analysis have shown that the ribbons consist of the soft magnetic alpha-Fe, hard magnetic Nd2Fe14B and disordered phases. The results showed that a uniform Nd2Fe14B/alpha-Fe nanocomposite structure with fine alpha-Fe grains can be obtained at an optimum velocity of the cooper roll of 20 m/s. The samples produced in these conditions had the best magnetic properties (µ0HC= 0.84 T, µ0MR = 1.05 T, µ0MS = 1.36 T, (BH)max = 160 kJ/m3) with strong exchange coupling between the hard magnetic Nd2Fe14B and soft magnetic alpha-Fe phases. The amorphous phase existing between grains causes an increase in the remanence and remanence ratio.
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