Artículo de revista
Magnetic and structural studies of (sn, ni –sn) substituted barium hexaferrites synthesized by ball milling
Fecha
2009Autor
González Angeles, Alvaro
Grusková, Anna
Sláma, Jozef
López Cuevas, Jorge
Sauceda Meza, Israel
Márquez González, Jesús
Pitalúa Díaz, Nun
Institución
Resumen
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%).