Optical and Electro-Optical Properties of YbFe2O4 Thin Films

Authors

  • Ram Rai Department of Physics, SUNY, Buffalo State, Buffalo NY 14222 USA
  • Josh Hinz Department of Physics, SUNY, Buffalo State, Buffalo NY 14222 USA
  • Michelle Pascolini Department of Physics, SUNY, Buffalo State, Buffalo NY 14222 USA
  • Kelly Bryzski Department of Physics, SUNY, Buffalo State, Buffalo NY 14222 USA

DOI:

https://doi.org/10.3126/jnphyssoc.v7i3.42191

Keywords:

multiferroics YbFe2O4, optical properties, YbFe2O4 thin films, electro-optical effects

Abstract

We present the optical and electro-optical properties of YbFe2O4 thin films, deposited on (0001) sapphire substrates. The optical spectra of YbFe2O4 show several electronic peaks arising from Fe2+ d to d on-site and O 2p to Fe 3d, Yb 6s, and Yb 5d charge-transfer transitions. The temperature dependence of the d to d electronic transition displays an anomaly around 150 K, which could be associated with a structural instability. Moreover, the YbFe2O4 thin film show strong electric-field-induced changes in optical properties in the energy range of 1-3 eV for applied electric fields less than 1 kV/cm. These electro-optical effects, which vary almost linearly with applied electric fields, are up to 14 % in magnitude at low temperatures and the effects completely disappear above 120 K. The observed electro-optical effects could be associated with the effects of external electric fields on the orbital-charge ordering of Fe ions.

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Published

2021-12-31

How to Cite

Rai, R., Hinz, J., Pascolini, M., & Bryzski, K. (2021). Optical and Electro-Optical Properties of YbFe2O4 Thin Films. Journal of Nepal Physical Society, 7(3), 47–52. https://doi.org/10.3126/jnphyssoc.v7i3.42191