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Spin-wave resonances in Eu$_{0.8}$Ce$_{0.2}$Mn$_2$O$_5$ and EuMn$_2$O$_5$ multiferroics

E. I. Golovenchits, V. A. Sanina, V. G. Zalesskii

Ioffe Physico-Technical Institute, Russian Academy of Sciences

Abstract: Spin-wave resonances have been observed in superlattices arising due to the phase separation and self-organization of charge carriers in Eu$_{0.8}$Ce$_{0.2}$Mn$_2$O$_5$ single crystals. The resonances are found within the $5$–$80$ K temperature range at frequencies close to $30$ GHz. Similar resonances with intensities about an order of magnitude lower are also observed in EuMn$_2$O$_5$. The latter suggests the existence of charge transfer processes between the manganese ions of different valences in EuMn$_2$O$_5$.

Received: 12.12.2011
Revised: 24.02.2012

 English version: Journal of Experimental and Theoretical Physics Letters, 2012, 95:7, 386–390

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