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The X‐ray photoelectron spectrum (XPS) core‐level spectra of pristine and doped bulk BiFeO3, namely Bi0.9BaxCayFeO3 with x + y = 0 and 0.1 were recorded on the Ar+‐ion sputtered sample surface at room temperature. Afterward, the obtained XPS spectra of Bi 4f, Fe 2p, O 1 s, Ba 3d and Ca 2p levels were inspected using the symmetric Gaussian‐Lorentzian product function, to study the influence of the...
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