Structural and magnetic properties study of nd16fe76-xnixb8 alloys with low ni contents

In this work we report a magnetic and structural study of Nd16Fe76-xNixB8 (x = 0, 2.5, 5, 7.5 and 10) alloys. This system was investigated by means of x-ray diffraction, Mössbauer spectrometry, and magnetization. The samples were melted in an arc furnace and then annealed during three days at 1000 oC. The results show the majority formation of the hard Nd2Fe14B tetragonal phase with lattice parameters a = 8.810 Å and c = 12.210 Å; these parameters do not vary substantially with the addition of Ni. Mössbauer results show a ferromagnetic contribution with six sites of iron associated to the Nd2Fe14B phase and a paramagnetic contribution as a doublet attributed to the Nd1,1Fe4B4 phase. The hysteresis cycles show that all the samples present a hard magnetic behavior, and the addition of Ni decreases this property.

• Autores: Jiménez, Juana M.; Vélez, Germán Y.; Zamora, Ligia E.; Pérez, Germán A.
• Tipo de recurso: Article of journal
• Fecha de publicación: 2012
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/72670
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/72670; http://bdigital.unal.edu.co/37144/
• Palabra clave: Magnetism; Mössbauer spectrometry; Nd2Fe14B permanent magnets; magnetic materials.; Magnetismo; espectrometría Mössbauer; imanes permanentes de Nd2Fe14B; materiales magnéticos.
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional