Excitation of Spin Waves in Superconducting Ferromagnets

Abstract

This Letter presents a theoretical analysis of propagation of spin waves in a superconducting ferromagnet. The surface impedance was calculated for the case when the magnetization is normal to the sample surface. We found the frequencies at which the impedance and the power absorption have singularities related to the spin wave propagation, and determined the form of these singularities. With a suitable choice of parameters, there is a frequency interval in which two propagating spin waves of the same circular polarization are generated, one of them having a negative group velocity.

arXiv comment4 pages, 2 figures, submitted to PRL

References in corpus (3)

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• Domain structure of superconducting ferromagnets
• A Transport and Microwave Study of Superconducting and Magnetic RuSr2EuCu2O8

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• Superluminal Propagation of Composite Collective Modes in Superconductor-Ferromagnet Heterostructures
• Skyrmion-vortex hybrid and spin wave solutions in superconducting ferromagnets
• Spin waves and high-frequency response in layered superconductors with helical magnetic structure