期刊
JOURNAL OF APPLIED PHYSICS
卷 111, 期 5, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3693588
关键词
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资金
- RFBR [12-02-00130, 10-02-01008, 10-03-00964]
- FASI [02.740.11.0384]
- DFG
- Alexander-von-Humboldt-Stiftung
- Committee for Science and Education of the Government of St. Petersburg
We report on optical studies of the thin films of multiferroic hexagonal (P.G. 6mm) rare-earth orthoferrites RFeO3 (R = Ho, Er, Lu) grown epitaxially on a (111)-surface of ZrO2(Y2O3) substrate. The optical absorption study in the range of 0.6-5.6 eV shows that the films are transparent below 1.9 eV; above this energy four broad intense absorption bands are distinguished. The absorption spectra are analyzed taking into account the unusual fivefold coordination of the Fe3+ ion. Temperature dependence of the optical absorption at 4.9 eV shows anomaly at 124 K, which we attribute to magnetic ordering of iron sublattices. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3693588]
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