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

Nobuhiro Matsushita, Tatsunobu Abe, Koichi Kondo, Shigeyoshi Yoshida, Masanori Abe

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We have prepared Mn-Zn ferrite films (MnxZnyFezO4.00-δ: 0.23<x<0.30, 0.0<y<0.38, 2.39<z<2.64) that are highly permeable in GHz range. The film resistivity ρ increased as the amount of Fe content z decreased and very high surface resistance R>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<-10 dB. These films were applicable as noise current suppressors deposited on an interlayer of multilayer printed circuit boards.

Original languageEnglish
Article number10G106
JournalJournal of Applied Physics
Volume97
Issue number10
DOIs
Publication statusPublished - 2005 May 15
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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