SmCo5/Fe nanocomposite magnetic powders processed by magnetic field-assisted ball milling with and without surfactant

• Published in: Journal of physics. D, Applied physics Applied physics, 2007-09, Vol.40 (17), p.5021-5026
• Main Authors: Saravanan, P, Gopalan, R, Rama Rao, N V, Manivel Raja, M, Chandrasekaran, V
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Magnetic properties and materials; Magnetic properties of nanostructures; Materials science; Nanoscale materials and structures: fabrication and characterization; Other topics in nanoscale materials and structures; Physics
• ISSN: 0022-3727; 1361-6463
• DOI: 10.1088/0022-3727/40/17/002

A magnetic field-assisted ball milling has been employed for the preparation of SmCo5 + 10 wt% Fe nanocomposite powders in the presence of oleic acid as surfactant. Milling experiments were also carried out without using surfactant and the nanocomposite powders so obtained, with and without surfactant, were investigated for their structural and magnetic properties using SEM, XRD, VSM and Mossbauer spectrometry. The field-milled SmCo5/Fe nanopowders in the presence of surfactant display a possible grain orientation and possess relatively high coercivity as compared with that of SmCo5/Fe powders obtained with field-milling or conventional milling. Mossbauer studies revealed that the formation of alpha-Fe(Co) (soft magnetic phase) is more pronounced for the powders milled without surfactant.