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We have studied the Mn 2p, Ca 2p, and Pr 4d core levels of Pr 1–x Ca x MnO 3 (x=0.2, 0.33, 0.4 and 0.84) as a function of x using X-ray photoelectron spectroscopy both at room temperature as well as 77K. Suppression of chemical potential shifts have been observed at 77K compared to that of room temperature spectra. We have discussed this result by considering the concept of...
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