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Ternary diagram of the samples A (엯), B (▾) and D (▿) before and after annealing in the temperature range for . The arrows are set to follow the increase of annealing temperature: start of the arrow ⇒ as grown layer; tip of the arrow ⇒ annealing at . Dashed line represents the tie line in the temperature interval (see Ref. 16).
(a) ratio vs annealing temperature ( annealing time) in the A–D series of samples, as obtained from ion beam analysis. The dashed line indicates the stoichiometry. (b) Electrical resistivity of the A–D series as a function of the annealing temperature ( annealing time). The drawn lines are only a guide for the eyes.
(a) FTIR absorption spectra of the layers A, B, C, and D before annealing. (b) FTIR spectra relative to sample C after annealing at different temperatures: 600, 750, 900 and . The same base line has been acquired for all the spectra. The different range of ordinates in (a) and (b) causes apparent different shape of the spectrum pertaining to sample C before annealing displayed in (a) and (b).
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