Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2004-09-22
Physics Letters A 332 (2004) 303-309
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Scientific paper
10.1016/j.physleta.2004.09.067
We discuss the problem of magnetic-dipolar oscillations combined with microwave resonators. The energy density of magnetic-dipolar or magnetostatic (MS) oscillations in ferrite resonators is not the electromagnetic-wave density of the energy and not the exchange energy density as well. This fact reveals very special behaviors of the geometrical effects. Compared to other geometries, thin-film ferrite disk resonators exhibit very unique interactions of MS oscillations with the cavity electromagnetic fields. MS modes in a flat ferrite disk are characterized by a complete discrete spectrum of energy levels. The staircase demagnetization energy in thin-film ferrite disks may appear as noticeable resonant absorption of electromagnetic radiation. Our experiments show how the environment may cause decoherence for magnetic oscillations. Another noticeable fact is experimental evidence for eigen-electric-moment oscillations in a ferrite disk resonator.
Awai I.
Kamenetskii E. O.
Saha Arun K.
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