Microwave magnetoabsorption in glass-coated amorphous microwires with radii close to skin depth

S. E. Lofland, H. Garcia-Miquel, M. Vazquez, S. M. Bhagat

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43 Scopus citations

Abstract

We present the frequency dependence of microwave magnetoabsorption in glass-coated amorphous microwires of (Co 100-xFe x) 72.5Si 12.5B 15. The data were taken at room temperature in the frequency range of 1-60 GHz for fields up to 15 kOe by either a cavity perturbation technique or a coaxial transmission line. The resulting spectra strongly depend upon the local microwave magnetic and electric fields. We have found that we can simulate the spectra using an analytic solution to the problem of electromagnetic scattering from a cylinder. We demonstrate that these unusual spectra can be interpreted in terms of ferromagnetic resonance and antiferromagnetic resonance. However, because the electromagnetic skin depth is comparable to the radius, the resonance and antiresonance fields do not follow the conventional equations.

Original languageEnglish (US)
Pages (from-to)2058-2063
Number of pages6
JournalJournal of Applied Physics
Volume92
Issue number4
DOIs
StatePublished - Aug 15 2002

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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