Microwave response of amorphous microwires: Magnetoimpedance and ferromagnetic resonance

M. Dominguez, J. M. Garcia-Beneytez, M. Vazquez, S. E. Lofland, S. M. Bhagat

Research output: Contribution to journalConference articlepeer-review

20 Scopus citations


It has been established that giant magnetoimpedance (GMI) in amorphous wires is due to a rapid change in the skin depth, caused by the low-field sensitivity of the azimuthal dynamic permeability (a classical electromagnetic effect). In 5μm diameter glass-covered amorphous wires, GMI may be observed at the microwave range. A correlation between GMI and ferromagnetic resonance (FMR) was proposed in this microwave range. We have measured the microwave response of amorphous microwires for several alloys from the system (Co100-xFex)75Si15B10 (x = 2, 6, 10) with positive, zero, and negative magnetostriction, respectively. Our main results indicate: (i) GMI and FMR effects are well separated at different fields, (ii) GMI follows the magnetization process, confirming its classical electromagnetic origin, and (iii) FMR fields are also affected by the skin effect.

Original languageEnglish (US)
Pages (from-to)117-121
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Issue number1-2
StatePublished - Aug 2002
EventInternational Workshop on Magnetic Wires - San Sebastian, Spain
Duration: Jun 20 2001Jun 22 2001

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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