Morphology and magnetic properties of CeCo5 submicron flakes prepared by surfactant-assisted high-energy ball milling

• Published in: Journal of magnetism and magnetic materials Vol. 324; no. 20; pp. 3272 - 3275
• Main Authors: Zhang, J.J., Gao, H.M., Yan, Y., Bai, X., Su, F., Wang, W.Q., Du, X.B.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.10.2012; Elsevier
• Subjects: Ball milling; CeCo5; Coercive force; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Copper; Domain effects, magnetization curves, and hysteresis; Exact sciences and technology; Flakes; Magnetic anisotropy; Magnetic fields; Magnetic properties and materials; Magnetically ordered materials: other intrinsic properties; Magnetization; Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects; Permanent magnets; Physics; Scanning electron microscopy; Studies of specific magnetic materials; Surfactant assisted high energy ball milling; Surfactants; Texture; Surfactant assisted high energy ball milling; CeCo5; Texture; Magnetic anisotropy; Scanning electron microscopy; Ball mill; Cerium alloys; Magnetic field effects; Magnetic hysteresis; Permanent magnets; XRD; CeCo; Coercive force; Rare earth alloys; Microstructure; Cobalt alloys; Transition element alloys
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2012.05.026

CeCo5 permanent magnetic alloy has been processed by surfactant assisted high energy ball milling. Heptane and oleic acid were used as the solvent and surfactant, respectively. The amount of surfactant used was 50% by weight of the starting powder. The produced particles were deposited on a piece of copper (4mm in length and width) under a magnetic field of 27kOe applied along the copper surface and immobilized by ethyl α-cyanoacrylate. Scanning electron microscope pictures show that the particles are flakes, several μm in length and width and tens of nm in thickness. X-ray diffraction patterns and magnetic measurements prove that the flakes are crystalline with c-axes magnetic anisotropy. The easy magnetization axis is oriented perpendicular to the surface of the flake. A maximum coercivity of 3.3kOe was obtained for the sample milled for 40min. ► CeCo5 permanent magnetic alloy has been processed by surfactant assisted high energy ball milling (HEBM). ► The particles show a flake-like morphology with several μm in length and width and tens nm in thickness. ► The flakes are crystallographic and magnetic anisotropic and the c-axes, also the easy magnetization directions are oriented perpendicular to the surface of the flake. ► Maximum coercivity of 3.3kOe has been obtained for the sample milled for 40min.