Oxygen isotope effect in chromium-doped Pr0.5Ca0.5MnO3 manganites |
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Authors: | N. A. Babushkina A. Maignan A. N. Taldenkov A. V. Inyushkin E. A. Chistotina |
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Affiliation: | (1) Russian Research Centre “Kurchatov Institute”, Moscow, 123182, Russia;(2) Laboratoire CRISMAT, ENSICAEN/CNRS, 14050 Caen Cedex, France |
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Abstract: | The effect of oxygen isotope substitution on the properties of Pr0.5Ca0.5Mn1 ? x Cr x O3 manganites (x = 0, 0.02, 0.05) have been studied. The introduction of chromium favors (i) the decomposition of a charge-ordered state and (ii) the appearance of a ferromagnetic metallic phase in Pr0.5Ca0.5Mn1 ? x Cr x 16–18O3. The isotope substitution 16O → 18O leads to a decrease in the content of the ferromagnetic phase, an increase in the charge-ordering transition temperature (T CO), and a decrease in the ferromagnetic transition temperature (T FM). The isotope mass exponent is evaluated. |
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