Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 406, Issue -, Pages 103-109Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2015.12.058
Keywords
Chemical reduction; Ni-Sn alloy; Phase transition; Magnetic study; Ferro magnet
Funding
- NCNSNT, University of Madras
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The Ni-Sn alloy was synthesized using borohydride assisted chemical reduction method. The composition of the synthesized alloy was determined using atomic absorption spectroscopy which revealed that the observed composition of Sn is high when compared to the initial composition. The ultrafine particles are clearly observed from field emission scanning electron microscope for all the sample. The X-ray diffraction measurement confirmed that the as-synthesized samples are of amorphous like nature while the samples annealed at 773 K showed crystalline nature. The Fourier transform infrared spectroscopy confirmed metallic bond stretching in the alloy samples. The crystallization and phase transition temperature was observed from differential scanning calorimetry. The shift in the crystallization temperature of Ni with increasing percentage of Sn was observed. The vibrating sample magnetometer was employed to understand the magnetic behavior of the Ni-Sn alloy. As-synthesized alloy samples showed paramagnetic nature while the annealed ones exhibit the soft ferromagnetic, antiferromagnetic and paramagnetic nature. The saturation magnetization value and magnetic ordering in the Ni-Sn alloys depend on the percentage of Sn present in the alloy. (C) 2015 Elsevier B.V. All rights reserved.
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