Anisotropic CeCo5 based permanent magnetic nanoflakes with high coercivity

• Published in: Ferroelectrics Vol. 522; no. 1; pp. 122 - 127
• Main Authors: Rong-ming, Liu, Dai-man, Zhu, Li-ying, Jia, Dan, Chuai, Jun, Xiong, Guo-hui, Hu, Qian, Wang, Bing-shan, Li
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis 02.01.2018; Taylor & Francis Ltd
• Subjects: Absorption spectroscopy; Anisotropy; Aspect ratio; CeCo; Coercivity; Crystal structure; Diffraction; Fourier transforms; Heptanes; Infrared absorption; Magnetic anisotropy; Magnetic properties; Mathematical morphology; Microscopy; nanoflakes; Oleic acid; Surface structure; surfactant assistant high energy ball milling; Surfactants; Thickness; X-ray diffraction
• ISSN: 0015-0193; 1563-5112
• DOI: 10.1080/00150193.2018.1392758

Magnetic anisotropic CeCo 5 nanoflakes with nominated compositions of CeCo 4.5 Cu 0.5 Fe 0.5 were prepared by surfactant assistant high-energy ball milling (SA-HEBM) with oleic acid as the surfactant and heptanes as the solvent. The crystal structure, morphology, and magnetic properties of these CeCo 5 nanoflakes, were examined with scanning electronic microscopy (SEM), X-ray diffraction (XRD), and vibrating sample magnetometer (VSM), respectively. The infrared absorption spectroscopy (FT-IR) was used to study the evolution of surface structure of oleic acid coated CeCo 5 nanoflakes. Results show that CeCo 5 nanoflakes have an average thickness of tens of nanometers, an average particle size of ∼3 μm, a relatively large aspect ratio, high room temperature (RT) coercivity of 5.4 kOe, and significant geometrical and magnetic anisotropy. The oleic acid surfactant in the SA-HEBM process plays an important role in the formation and development process of the obvious magnetic anisotropy of CeCo 5 nanoflakes.