Ferromagnetic resonance and antiresonance in glass-coated amorphous microwires

• Published in: Journal of magnetism and magnetic materials Vol. 249; no. 1; pp. 274 - 277
• Main Authors: Bhagat, S.M., Garcia-Miquel, H., Lofland, S.E.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.08.2002; Elsevier Science
• Subjects: Amorphous and nanocrystalline magnetic materials; quasicrystals; Amorphous and quasicrystalline magnetic materials; Amorphous microwires; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Ferromagnetic resonance; Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance; Magnetic properties and materials; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Magnetoabsorption; Physics; Studies of specific magnetic materials; Ferromagnetic resonance; Magnetoabsorption; Amorphous microwires; Electrodynamics; Glass; Iron alloys; Amorphous state; Permeability; Experimental study; Boron alloys; Frequency effect; Coated material; Silicon alloys; Wires; Cobalt alloys; Transition element alloys
• ISSN: 0304-8853
• DOI: 10.1016/S0304-8853(02)00543-7

We report magnetoabsorption measurements on micron-size wires of (Co 100− x Fe x ) 72.5Si 12.5B 15 at frequencies of 9.7, 26.7, 32.7, and 56 GHz, that is where the electromagnetic skin depth is comparable to the radius. The observed spectra are quite unconventional. In order to understand them, it is necessary to take explicit account of the variation of the RF fields inside the cylindrical sample and then express the absorption in terms of the concomitant permeability tensor.