Optical transitions in magnetoelectric Ga0.6Fe 1.4O3 from 0.73 to 6.45 eV

Sukgeun Choi, Christophe Lefèvre, Francois Roulland, Christian Mény, Nathalie Viart, Bobby To, Devyn E. Shafer, Ranhee Shin, Jihye Lee, William Jo

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The optical properties of polycrystalline Ga0.6Fe 1.4O3 bulk are determined by spectroscopic ellipsometry from 0.73 to 6.45 eV. Complex dielectric function ε=ε 1+iε2 spectra are obtained from the multilayer analysis. The ellipsometric data exhibit numerous optical structures, and the transition energies are accurately obtained by analyzing the second-energy derivatives of the data. The origins of the optical structures are explained in terms of Fe3+ ligand field transitions and ligand-to-metal charge transfer transitions.

Original languageEnglish
Article number041204
JournalJournal of Vacuum Science and Technology B:Nanotechnology and Microelectronics
Issue number4
StatePublished - Jul 2012

Bibliographical note

Funding Information:
This work was supported by the Leading Foreign Research Institute Recruitment Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (MEST) (2011-00267). The work done at National Renewable Energy Laboratory (NREL) is supported by the U.S. Department of Energy under Contract No. DE-AC36-08GO28308.


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