Electronic excitations and optical properties of YbFe                         2                         O                         4                          thin films

R. C. Rai; J. Hinz; M. Pascolini; F. Sun; H. Zeng

doi:10.1016/j.tsf.2019.01.035

Electronic excitations and optical properties of YbFe ₂ O ₄ thin films

R. C. Rai
, J. Hinz
, M. Pascolini
, F. Sun
, H. Zeng

Physics

Buffalo State College, State University of New York
SUNY Buffalo

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We present the structural, optical properties, and electronic excitation spectra of the YbFe ₂ O ₄ thin film deposited on (0001) sapphire substrates. The optical spectra of a YbFe ₂ O ₄ thin film show several electronic transitions, dominated by Fe d to d on-site electronic transitions as well as O 2p to Fe 3d, Yb 6s, and Yb 5d charge-transfer electronic transitions. The direct energy band gap of YbFe ₂ O ₄ has been found to be 1.40 ± 0.01 eV at 300 K. Moreover, the electronic transitions centered at 1.75 eV and 2.41 eV exhibit strong temperature dependence with a discontinuity at ∼190 ± 10 K, indicating evidence for a structural instability in the system. The optical spectra of YbFe ₂ O ₄ have been analyzed and also compared with that of isostructural YFe ₂ O ₄ and LuFe ₂ O ₄ .

Original language	English
Pages (from-to)	57-61
Number of pages	5
Journal	Thin Solid Films
Volume	673
DOIs	https://doi.org/10.1016/j.tsf.2019.01.035
State	Published - Mar 1 2019

Keywords

Band gap
Electronic excitation
Thin film
Ytterbium ferrite

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10.1016/j.tsf.2019.01.035

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@article{dadf7e8409094a42afc1efe942d482a7,

title = " Electronic excitations and optical properties of YbFe 2 O 4 thin films ",

abstract = " We present the structural, optical properties, and electronic excitation spectra of the YbFe 2 O 4 thin film deposited on (0001) sapphire substrates. The optical spectra of a YbFe 2 O 4 thin film show several electronic transitions, dominated by Fe d to d on-site electronic transitions as well as O 2p to Fe 3d, Yb 6s, and Yb 5d charge-transfer electronic transitions. The direct energy band gap of YbFe 2 O 4 has been found to be 1.40 ± 0.01 eV at 300 K. Moreover, the electronic transitions centered at 1.75 eV and 2.41 eV exhibit strong temperature dependence with a discontinuity at ∼190 ± 10 K, indicating evidence for a structural instability in the system. The optical spectra of YbFe 2 O 4 have been analyzed and also compared with that of isostructural YFe 2 O 4 and LuFe 2 O 4 .",

keywords = "Band gap, Electronic excitation, Thin film, Ytterbium ferrite",

author = "Rai, \{R. C.\} and J. Hinz and M. Pascolini and F. Sun and H. Zeng",

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year = "2019",

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day = "1",

doi = "10.1016/j.tsf.2019.01.035",

language = "English",

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pages = "57--61",

journal = "Thin Solid Films",

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Electronic excitations and optical properties of YbFe ₂ O ₄ thin films . / Rai, R. C.; Hinz, J.; Pascolini, M. et al.
In: Thin Solid Films, Vol. 673, 01.03.2019, p. 57-61.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Electronic excitations and optical properties of YbFe 2 O 4 thin films

AU - Rai, R. C.

AU - Hinz, J.

AU - Pascolini, M.

AU - Sun, F.

AU - Zeng, H.

PY - 2019/3/1

Y1 - 2019/3/1

N2 - We present the structural, optical properties, and electronic excitation spectra of the YbFe 2 O 4 thin film deposited on (0001) sapphire substrates. The optical spectra of a YbFe 2 O 4 thin film show several electronic transitions, dominated by Fe d to d on-site electronic transitions as well as O 2p to Fe 3d, Yb 6s, and Yb 5d charge-transfer electronic transitions. The direct energy band gap of YbFe 2 O 4 has been found to be 1.40 ± 0.01 eV at 300 K. Moreover, the electronic transitions centered at 1.75 eV and 2.41 eV exhibit strong temperature dependence with a discontinuity at ∼190 ± 10 K, indicating evidence for a structural instability in the system. The optical spectra of YbFe 2 O 4 have been analyzed and also compared with that of isostructural YFe 2 O 4 and LuFe 2 O 4 .

AB - We present the structural, optical properties, and electronic excitation spectra of the YbFe 2 O 4 thin film deposited on (0001) sapphire substrates. The optical spectra of a YbFe 2 O 4 thin film show several electronic transitions, dominated by Fe d to d on-site electronic transitions as well as O 2p to Fe 3d, Yb 6s, and Yb 5d charge-transfer electronic transitions. The direct energy band gap of YbFe 2 O 4 has been found to be 1.40 ± 0.01 eV at 300 K. Moreover, the electronic transitions centered at 1.75 eV and 2.41 eV exhibit strong temperature dependence with a discontinuity at ∼190 ± 10 K, indicating evidence for a structural instability in the system. The optical spectra of YbFe 2 O 4 have been analyzed and also compared with that of isostructural YFe 2 O 4 and LuFe 2 O 4 .

KW - Band gap

KW - Electronic excitation

KW - Thin film

KW - Ytterbium ferrite

UR - https://www.scopus.com/pages/publications/85060452948

U2 - 10.1016/j.tsf.2019.01.035

DO - 10.1016/j.tsf.2019.01.035

M3 - Article

AN - SCOPUS:85060452948

SN - 0040-6090

VL - 673

SP - 57

EP - 61

JO - Thin Solid Films

JF - Thin Solid Films

ER -

Electronic excitations and optical properties of YbFe ₂ O ₄ thin films

Abstract

Keywords

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