Magnetic and structural studies of (sn, ni –sn) substituted barium hexaferrites synthesized by ball milling

Samples of BaFe12-2x(SnSn)xO19 and BaFe12-2x(NiSn)xO19 were processed by high energy milling with 0 ≤ x ≤ 0.4 and 0 ≤ x ≤ 0.3 respectively. Sn2+-Sn4+ mixture considerably improved the saturation magnetization, Ms, (from 60.9 to 66.15 A.m2/kg) and diminished quickly the intrinsic coercivity, Hci, (381.1-72.33 kA/m) to suitable values for high-density magnetic recording applications, with low substitution values. On the other hand, the Ni2+-Sn4+ mixture also decreased the coercivity rapidly (diminution ~ 75%) however without enhancing the saturation magnetization. The shown differences on magnetic properties were mainly due to both magnetic nature of divalent ion and secondary phase presence. Mixtures with Sn2+ as partner ion diminished markedly to Tc (~21%).

• Autores: González Angeles, Alvaro; Grusková, Anna; Sláma, Jozef; López Cuevas, Jorge; Sauceda Meza, Israel; Márquez González, Jesús; Pitalúa Díaz, Nun
• Tipo de recurso: Article of journal
• Fecha de publicación: 2009
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/26371
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/26371; http://bdigital.unal.edu.co/17418/
• Palabra clave: Magnetic materials; Magnetic properties; Nanocrystalline materials; substituted hexaferrites.
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional