Abstract
Infrared absorption spectra of the La 0.75 Ca 0.25 MnO 3 manganite have been collected over the spectral range 600-1100 cm m 1 along isobaric paths at P =0,2,4, and 7 GPa in the 240-320 K temperature range. The pressure dependence of the insulator-to-metal transition temperature T IM has been determined from the spectra analysis and the first PT phase diagram of a manganite in the high-pressure regime is presented and discussed.
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