Experimental results and analysis of Yb-Co doped strontium ferrites prepared by the coprecipitation

Abstract

M-type strontium ferrites Sr_1-xYb_xFe_12-xCo_xO₁₉ (x = 0, 0.05, 0.1, 0.15, 0.2) were co-doped with equivalent Yb-Co ions by the co-precipitation method. When the doping amount was 0 ≤ x ≤ 0.1, the synthesized products shown a single phase M-type strontium ferrite. When x > 0.1, the phase of α-Fe₂O₃ and CoFe₂O₄ appeared in the sample, and the most of grains were the six angle flake structure. When x = 0.1, the saturation magnetization (Ms), the remanent magnetization (Mr) and the coercive force (Hc) of strontium ferrites Sr_0.9Yb_0.1Fe_11.9Co_0.1O₁₉ reached to the maximum values of 60.89 emu/g, 31.96 emu/g and 6846 Oe, respectively.

Keywords:

• Chemical co-precipitation method
• M-type strontium ferrites
• Magnetic properties
• Yb-Co substitution

Additional information

Funding

The authors gratefully acknowledge financial supports from the Program for the Innovative Research Team in University of Heilongjiang Province (2013TD008), Education Department Program of Heilongjiang Province (12541111) and Postdoctoral Scientific Developmental Fund of Heilongjiang Province (LBH-Q16122).