Abstract
In polycrystalline cerium iron garnet films, the gap in the electron excitation spectrum and electronic transitions between di- and tetravalent iron and cerium impurity ions have been established from the IR absorption spectra. The temperatures of delocalization of the ferrous states of iron have been found from the impedance spectroscopy, electrical resistance, and IR spectroscopy data. The difference between the ac and dc magnetoresistances has been established and explained using a model of a dielectrically inhomogeneous medium.
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ACKNOWLEDGMENTS
We are grateful to A.I. Strognii, Scientific and Practical Materials Research Center, National Academy of Sciences of Belarus, for providing us with the samples.
Funding
This study was supported by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Krai, and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project no. 18-42-240001 “Inversion of the Sign of Magnetoelectric Tensor Components with Temperature in the Neodymium-Doped Bismuth Iron Garnet Films.”
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Aplesnin, S.S., Masyugin, A.N., Kretinin, V.V. et al. Magnetoresistance and IR Spectrum of Impurity States in the Ce3Fe5O12 Film. Phys. Solid State 63, 242–247 (2021). https://doi.org/10.1134/S1063783421020025
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DOI: https://doi.org/10.1134/S1063783421020025