Enhanced microstructure homogeneity, density and magnetic performances of the BaM hexaferrite/PDMS composite films through solvent-assisted synthesis

The self-biased M-type barium hexaferrite BaFe12O19 (BaM)/polydimethylsiloxane (PDMS) composite films with enhanced homogeneity, density and magnetic properties were synthesized on silicon substrates. The film materials with BaM content ranging from 60 wt% to 80 wt% were prepared through a solvent-assisted composite process at relatively low temperature of 100 ?. Experimental results reveal that the added butanone solvent significantly improves the homogeneity and dispersity of BaM and in turn enhances the density, magnetic remanent and saturation magnetizations. Compared with the traditional composite films without butanone assist, the present BaM/PDMS films increase the remanent magnetization more that 35%. For the composite sample with 80 wt% BaM, the remanent and saturation magnetizations achieve to 1486 Gs and 2015 Gs, respectively, while the anisotropy field reaches-18 kOe. These low-temperature synthesized BaM composite films provide excellent potential for applications in monolithic integration of magnetic devices.

Automated summary

Self-biased M-type barium hexaferrite/polydimethylsiloxane composite films with enhanced homogeneity, density, and magnetic properties have been successfully synthesized using a solvent-assisted composite process at low temperature. The addition of butanone solvent significantly improves the performance of the composite films, including the density and magnetic properties.