Pressure-temperature phase diagram of charge ordering in Nd1/2Sr1/2MnO3

Details Pressure-temperature phase diagram of charge ordering in Nd1/2Sr1/2MnO3 Pressure-temperature phase diagram of charge ordering in Nd1/2Sr1/2MnO3

2010-11-02

arxiv.org/abs/1011.0665v1

EPL 92, 47001 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 figures, EPL (2010) in press

Scientific paper

10.1209/0295-5075/92/47001

We observe how the charge-ordering (CO) temperature of Nd1/2Sr1/2MnO3 decreases with the external pressure p from 160 K at p = 0 down to 30 K at p ~ 4.5 GPa, by measuring the values p, T where the far-infrared spectral weight of the metallic phase is fully recovered. We thus determine the (p, T) phase diagram of CO in that manganite. We also find that the parameter d(lnTCO)/dp which describes this metallization from the CO phase is equal and opposite to the quantity d(lnTc)/dp which governs the metallization of the paramagnetic state at comparable Curie temperatures Tc, in similar manganites at half doping.

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