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- Title
Magnetic and dielectric properties of the M-type barium strontium hexaferrite (Ba<sub> x</sub>Sr<sub>1− x</sub>Fe<sub>12</sub>O<sub>19</sub>) in the RF and microwave (MW) frequency range.
- Authors
Pereira, F.M.M.; Santos, M.R.P.; Sohn, R.S.T.M.; Almeida, J.S.; Medeiros, A.M.L.; Costa, M.M.; Sombra, A.S.B.
- Abstract
This paper presents results for the dielectric permittivity ( ε′), dielectric loss (tg δE) dielectric permeability ( μ′) and magnetic loss (tg δM) in the radio-frequency and microwave frequency range of Ba xSr1− xFe12O19 hexaferrite (0 ≤ x ≤ 1). The samples were prepared by a new route of the ceramic method. The magnetic permeability ( μ′) and magnetic loss (tg δM) measurements in the range 100 MHz to 1.5 GHz, reveals that 1.32 ≤ μ′ ≤ 1.68 for the permeability of BFO100 (BaFe12O19) and 1.16 < μ′ ≤ 1.88 for SFO100 (SrFe12O19) in the range of studied frequencies. The BFO100 sample presented lower loss (tg δM = 4.10−3 at 1.5 GHz). The permittivity of BFO100 and SFO100 in 1.5 GHz are, respectively 8.18 and 8.19, and in the 1 MHz are, respectively 52.04 and 19.09. The samples presented coercive field in the range of 3–5 kOe and remanence magnetization in the range of 33–36 emu/g. The subjects of paper were study the dielectric and magnetic properties of the barium and strontium hexaferrite, in view of applications as a material for permanent magnets, high density magnetic recording and microwave devices.
- Subjects
FERRITES; MAGNETIC properties; DIELECTRICS; BARIUM compounds; RADIO frequency; MAGNETIC permeability
- Publication
Journal of Materials Science: Materials in Electronics, 2009, Vol 20, Issue 5, p408
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-008-9744-8