Highly resistive Mn-Zn ferrite films prepared from aqueous solution for GHz conducted noise suppressors

Abstract

We have prepared Mn-Zn ferrite films (MnxZnyFezO4.00-δ: 0.23 108 Ω/sq was attained for the film having z<2.6. The deposited Mn-Zn ferrite films had a large saturation magnetization Ms=380-460 emucm3 and relatively low coercivity Hc=11-29 Oe. The Mn-Zn ferrite films contacted to a microstrip line (50 Ω) exhibited very large transmission loss ΔPloss per thickness t, ΔPlosst, of about 10 times larger than that of commercialized composite sheet. They exhibited sufficiently low reflection coefficient S11