Performance of crossed anisotropy multilayered CoZrNb films as IC chip level electromagnetic noise suppressor

Yutaka Shimada, Jingyan Ma, Tetsuo Ito, Kunio Yanagi, Yasushi Endo, Sho Muroga, Masahiro Yamaguchi

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Co-Zr-Nb multilayers with crossed anisotropy along with multilayers with uniaxial anisotropy were investigated from the standpoint of electromagnetic noise suppressors. Frequency dependences of conduction losses and magnetic near field intensity of a microstrip line (MSL) covered with these multilayers were measured simultaneously. It was found that ferromagnetic resonance excited by RF field from MSL takes a major role of noise suppression over a wide frequency. The ferromagnetic resonance frequency is determined by intrinsic anisotropy field. In addition, shape anisotropy field caused by presence of MSL is negligibly small. The in-plane isotropy feature of noise suppressing performance for the crossed anisotropy films was verified experimentally and numerically.

Original languageEnglish
Article number6971310
JournalIEEE Transactions on Magnetics
Volume50
Issue number11
DOIs
Publication statusPublished - 2014 Nov 1

Keywords

  • Co-Zr-Nb
  • Conductive loss
  • electromagnetic noise suppressor
  • ferromagnetic resonance (FMR)
  • integrated circuit (IC) chip
  • microstrip line (MSL)
  • near field
  • permeability thin film

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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