Published November 15, 2009 | Version v1
Journal article

The interface reaction of high-k La2Hf2O7/Si thin film grown by pulsed laser deposition

  • 1. Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026 (China)
  • 2. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029 (China)

Description

The La2Hf2O7 films have been deposited on Si (1 0 0) substrate by using pulsed laser deposition (PLD) method. X-ray diffraction (XRD) demonstrates that the as-grown film is amorphous and crystallizes after 1000 deg. C annealing. The interface structure is systematically studied by Synchrotron X-ray reflectivity (XRR), Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS). Silicide, silicate and SiOx formations from interfacial reaction are observed on the surface of the Si substrate in the as-grown film. The impact of silicide formation on the electrical properties is revealed by capacitance-voltage (C-V) measurements. By post-deposition annealing (PDA), silicide can be effectively eliminated and C-V property is obviously improved.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.apsusc.2009.08.070

Additional details

Identifiers

DOI
10.1016/j.apsusc.2009.08.070;
PII
S0169-4332(09)01217-3;

Publishing Information

Journal Title
Applied Surface Science
Journal Volume
256
Journal Issue
3
Journal Page Range
p. 838-841
ISSN
0169-4332
CODEN
ASUSEE

Optional Information

Copyright
Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.