TY - JOUR
T1 - Resonances in large ferrimagnetic YIG samples - Electrodynamic analysis
AU - Krupka, Jerzy
AU - Pacewicz, Adam
AU - Salski, Bartlomiej
AU - Kopyt, Pawel
AU - Bourhill, Jeremy
AU - Goryachev, Maxim
AU - Tobar, Michael
PY - 2021/3/1
Y1 - 2021/3/1
N2 - Electrodynamic (ED) analysis of the TEn0p (TE theta phi r) modes in a shielded single-crystal-5-mm-diameter yttrium iron garnet (YIG) sphere has been performed and compared with the results of previous experiments. Measurements and ED analysis of the HE111 +/- mode resonances in a polycrystalline Al-doped rod-shaped YIG sample have been performed for comparison. It has been shown that electromagnetic resonances in large shielded YIG spheres behave in a similar way as typical resonances occurring in dielectric resonators under conditions when the effective permeability is positive, and as so-called magnon resonances when the effective permeability is negative. Nevertheless, both types of resonances are solutions to the same transcendental equation. Computations reported herein suggest that the physical nature of resonance systems containing dispersive gyrotropic media can be described within a common framework of electromagnetic resonance systems with unequal stored magnetic and electric energies, which offers an alternative to the more widely used quantum and harmonic oscillator models.
AB - Electrodynamic (ED) analysis of the TEn0p (TE theta phi r) modes in a shielded single-crystal-5-mm-diameter yttrium iron garnet (YIG) sphere has been performed and compared with the results of previous experiments. Measurements and ED analysis of the HE111 +/- mode resonances in a polycrystalline Al-doped rod-shaped YIG sample have been performed for comparison. It has been shown that electromagnetic resonances in large shielded YIG spheres behave in a similar way as typical resonances occurring in dielectric resonators under conditions when the effective permeability is positive, and as so-called magnon resonances when the effective permeability is negative. Nevertheless, both types of resonances are solutions to the same transcendental equation. Computations reported herein suggest that the physical nature of resonance systems containing dispersive gyrotropic media can be described within a common framework of electromagnetic resonance systems with unequal stored magnetic and electric energies, which offers an alternative to the more widely used quantum and harmonic oscillator models.
KW - Ferromagnetic resonance
KW - YIG
KW - Electrodynamic analysis
KW - Resonances in dispersive medium
KW - MODES
UR - http://www.scopus.com/inward/record.url?scp=85096850283&partnerID=8YFLogxK
U2 - 10.1016/j.jmmm.2020.167536
DO - 10.1016/j.jmmm.2020.167536
M3 - Article
SN - 0304-8853
VL - 521
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
M1 - 167536
ER -