CHEMICAL VAPOR DEPOSITION OF THIN FILM MATERIALS FOR ...

MgAl2O4 substrate is showed in Fig.46. Lattice fringes could be clearly seen from both {220}
and {040} planes. The dark area might be from antiphase boundaries as has been reported by R.
Datta, et. al..[163] The area in the red box of Fig.46(a) is Fourier filtered to exhibit the
diffraction information only from the {040} planes. Break of periodicities has been found and
marked with red circles in Fig.46(b). The lattice mismatch and difference of thermal expansion
coefficients could both contribute to the presence of irregular lattice planes at the interface of
thin film growth.
Fig. 45. Bright field TEM image of nickel ferrite on MgAl2O4 deposited under 600˚C. The image is taken under two
beam conditions with g = . Courtesy of Dr. R Datta for taking the TEM image.
Fig. 46. (a) HRTEM image of the interface between nickel ferrite film and MgAl2O4 substrate; (b) Fourier transform
of the area in the red box of the HRTEM image, the as left lattice fringes are from {040} planes. Courtesy of Dr. R
Datta for taking the HRTEM images.
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