A study of the magnetic properties of LaNi5-xSix alloys and their hydrides

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Nhan Ba Dam Van Tuan Chu Anh Tuan Do Quyet Thang Le


In this work, we study the influence of the substitution Si for Ni for the magnetic properties of LaNi5-xSix (x = 0-0.5) alloys. The structure of the alloy was tested by X-ray diffraction (XRD) measurements. The magnetic properties of the samples were carried out using a vibrating sample magnetometer (VSM) system. The results showed that when Ni was substituted for Si in alloys and after hydrogen absorption, LaNi5-xSix alloys retained their CaCu5 structure. The susceptibility (χ) of the alloys decreased when substituting Ni by Si increased. The original bulk samples showed a Pauli paramagnetism state after hydrogen absorption transformed into a superparamagnetic state. The results obtained showed that although measurements of magnetic characteristics are relatively simple, quantitative information about the microscopic processes occurring in the material was used as the negative electrode in Ni-MH rechargeable battery.

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BA DAM, Nhan et al. A study of the magnetic properties of LaNi5-xSix alloys and their hydrides. Vietnam Journal of Science, Technology and Engineering, [S.l.], v. 59, n. 2, p. 5-9, june 2017. ISSN 2525-2461. Available at: <http://vietnamscience.vn/index.php/vistech/article/view/34>. Date accessed: 22 oct. 2017.