In this paper, a novel inclusion shape (hi-helix) for artificial magne
tic composites is studied. The developed analytical model is used to a
nalyze the eigenmodes and frequency dispersion of the polarizabilities
. Experimental investigations (cavity measurements) reveal the main fe
atures of the physical phenomena of electromagnetic excitation of indi
vidual bi-helix particles. Sheet samples of hi-helix composites are st
udied by free space measurements. The results lead to the conclusion t
hat the use of new particles can help to improve electromagnetic param
eters of magnetic composites. In particular, the magnetic moments appe
ar to be larger than in conventional inclusions, and the resonance fre
quency of the magnetic permeability is different from that of the effe
ctive permittivity.