Magnetic properties of Co–Ti substituted barium hexaferrite
2012; Elsevier BV; Volume: 546; Linguagem: Inglês
10.1016/j.jallcom.2012.08.029
ISSN1873-4669
AutoresWenjie Zhang, Yang Bai, Xi Han, Liang Wang, Xuefei Lu, Lijie Qiao,
Tópico(s)Multiferroics and related materials
ResumoThis paper demonstrated the magnetic properties of Co–Ti substituted M-type hexaferrite of Ba(CoTi)xFe12–2xO19 (x = 0.9–1.4), which was prepared by the solid-state reaction method. The single-phased M-type hexaferrite was obtained at 1050 °C, and the samples could be sintered well at 1200 °C. Co–Ti substitution reduces both saturation magnetization and coercivity of M-type hexaferrite, and gradually turns the magnetocrystalline anisotropy from uniaxial to planar within the composition range of x = 0.9–1.2. When x ⩾ 1.1, the samples have a good soft magnetic property with low coercivity and they exhibit high permeability in very high frequency range. Among them, the x = 1.2 sample has the best magnetic property with both high permeability of μ′ = 40 and high cut-off frequency of 300 MHz.
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