the lossy ferrimagnetic filler comprising spinel ferrite having the general formula 1 x x Fe2 O3, where Aa and Bb are divalent metal cations selected from the group consisting of Ba, Cd, co, Cu, Fe, Mg, {HEAD ~ Mn}, {TAIL ~ Ni}, Sr and Zn, and x is a fractional number on the interval 0,1), 
the lossy ferrimagnetic filler comprising spinel ferrite having the general formula 1 x x Fe2 O3 , where Aa and Bb are divalent metal cations selected from the group consisting of Ba , Cd , co , Cu , Fe , Mg , { HEAD ~ Mn } , { TAIL ~ Ni } , Sr and Zn , and x is a fractional number on the interval 0,1 ) ,
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