Fig. 4: Atomic-scale observation before and after SOA. | NPG Asia Materials

Fig. 4: Atomic-scale observation before and after SOA.

From: Experimental realization of strain-induced room-temperature ferroelectricity in SrMnO3 films via selective oxygen annealing

Fig. 4

a HRTEM image of the as-grown SMO film with a thickness of 20 nm on the LSAT substrate with the FFT of each layer. b Schematic of the ideal SMO structure along the [−110] direction. c HRTEM image of the SRO (20 nm) capped SMO thin film after oxygen annealing with a thickness of 20 nm on LSAT with the FFT of each layer. d Diffraction pattern of the area in panel c. e Magnified image of the boxed area in panel c showing the polar SMO structure where the Sr and Mn cations are indicated by green and purple, respectively.

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