Structural, magnetic and electric properties of Sr0.95Y0.05Fe12-xZrxO19 (x=0-2) M-type hexaferrites

Abstract

The ceramic technique has been utilized to fabricate Sr0.95Y0.05Fe12-xZrxO19 (x = 0-2) samples. Structural and Raman-scattering analyses have revealed that the samples with x = 0 and 0.5 possess the M-type hexagonal-ferrite phase, while the others have the additional Zr-related phase. All samples exhibit the hard-magnetic behavior and the magnetic parameters tend to decrease with increasing Zr-doping content. The study on the electric polarization has indicated that the sample with x = 0 shows the coexistence of paraelectric and weak ferroelectric behaviors, while the other samples (x = 0.5-2) show conductive behaviour with nearly circular loops. The changes in the magnetic and electrical properties mainly related to the co-presence of Fe2+ and Fe3+ ions, as evidenced from analyzing X ray absorption data.