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Applied Physics A

, 125:64 | Cite as

Crystallization-dependent structural and optical properties of Mn1.56Co0.96Ni0.48O4 thin films grown by chemical solution deposition on Si (100)

  • W. Zhou
  • C. Y. Wu
  • Y. M. Yin
  • W. L. Ma
  • Z. M. HuangEmail author
Article
  • 34 Downloads

Abstract

Mn1.56Co0.96Ni0.48O4 (MCN) thin films are deposited onto Si (100) substrate under different post-annealing temperatures of 450 °C and 600 °C. As identified by the X-ray diffraction (XRD) and SEM, pronounced difference in crystallinity is observed between the film annealed under 600 °C and 450 °C. Spectroscopic ellipsometry spectra, infrared transmission and reflection spectra are measured to compare and analyze the optical properties of the crystalline and non-crystalline MCN thin films. Ellipsometry measurement demonstrates the n, k spectra in the visible-to-near infrared range (300–1000 nm), indicating three absorption peaks locating at 1.6 eV, 2.6 eV, and above 3.5 eV for the crystallized sample, which corresponds to the charge-transfer (CT) transition involving O2− (2p) and Mn4+ (3d) ions, O2− (2p) to Co2+ (3d) ions, and O2− (2p) and Mn3+ (3d) ions, respectively. Transmittance and reflectance spectra in the near infrared (1.3 µm)-to-far infrared (25 µm) range are also investigated. A two-oscillator model is performed to directly analyze the combined transmission and reflection spectra in the far infrared (400 cm−1–800 cm−1) to acquire the optical constants, where the difference of n, k values of the crystallized and non-crystalline MCN films in reststrahlen band is investigated for the first time.

Notes

Acknowledgements

This work was supported by Innovation Shanghai Institute of Technical Physics, CX-197; National Science Fund (NSF) for Youth of China, Grant No. 61604160; NSF for Distinguished Youth Scholars, Grant No. 61625505.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • W. Zhou
    • 1
  • C. Y. Wu
    • 1
  • Y. M. Yin
    • 1
  • W. L. Ma
    • 1
  • Z. M. Huang
    • 1
    Email author
  1. 1.State Key Laboratory of Infrared PhysicsShanghai Institute of Technical PhysicsShanghaiChina

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