We have prepared Mn-Zn ferrite films (MnxZnyFezO4.00−δ: 0.23 108Ω∕sq was attained for the film having z<2.6. The deposited Mn-Zn ferrite films had a large saturation magnetization Ms=380–460emu∕cm3 and relatively low coercivity Hc=11–29Oe. The Mn-Zn ferrite films contacted to a microstrip line (50Ω) exhibited very large transmission loss ΔPloss per thickness t, ΔPloss∕t, of about 10 times larger than that of commercialized composite sheet. They exhibited sufficiently low reflection coefficient S11<−10dB. These films were applicable as noise current suppressors deposited on an interlayer of multilayer printed circuit boards.
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Matsushita et al. (2005) studied this question.
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