Implementation of single/multi-layer magnetic-anisotropy magnetic polymer composites for magnetic property modulation

This study exploits the two stage solidification technology to fabricate the isotropie/anisotropie magnetic polymer composites (MPC, polymer with magnetic particles). Multilayer magnetic isotropie/anisotropie MPC film can also be implemented using the two stage solidification process layer by layer. Merits of proposed technology: (1) material properties of magnetic-anisotropy MPC layer is realized using the two stage solidification and anisotropie magnetization processes, and (2) film with various magnetic properties can also be implemented using different composition of multilayer magnetic anisotropy MPCs. In applications, the multilayer polymer NdFeB magnetic composites are realized in silicon substrate and further integrate with MEMS structures. The 1-3 layers of different magnetic anisotropy MPC are demonstrated. Performances enhancement of magnetic anisotropy 30wt% NdFeB MPC (vs isotropie MPC) are: coercivity force (3.4%), remanence (304%), and saturation magnetization (268%). Anisotropie magnetostatic shielding effect that reduced from 0.45Telsa to 0.3-0.35Telsa) is also achieved. Moreover, changing of magnetic field distributions after different magnetic anisotropy MPC layers stacking is also demonstrated.