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arXiv · 0710.1546

Hydrostatic pressure effects on the electrical transport properties of Pr0.5Sr0.5MnO3

F. J. Rueckert·M. Steiger·B. K. Davis·T. Huynh·J. J. Neumeier·M. S. Torikachvili
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Abstract

We studied single-crystalline Pr0.5Sr0.5MnO3 by means of measurements of magnetic susceptibility and specific heat at ambient pressure (P), and electrical resistivity (r) in hydrostatic pressures up to 2 GPa. This material displays ferromagnetic (FM) order, with Curie temperature TC ~ 255 K. A crystallographic transformation from I4/mcm to Fmmm is accompanied by the onset of antiferromagnetism (AFM), with Neel temperature TN ~ 161 K. The effect of pressure is to lower TC, and raise TN at the approximate rates of -3.2 K/GPa, and 14.2 K/GPa, respectively. Although the value of TN increases with P, due to the enhancement of the superexchange interactions, the AFM-Fmmm state is progressively suppressed, as pressure stabilizes the FM-I4/mcm phase to lower temperatures. The r vs T data suggest that the AFM phase should be completely suppressed near 2.4 GPa.

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F. J. Rueckert, M. Steiger, B. K. Davis, T. Huynh, J. J. Neumeier, M. S. Torikachvili. 2007-09-29. Hydrostatic pressure effects on the electrical transport properties of Pr0.5Sr0.5MnO3. https://doi.org/10.1103/physrevb.77.064403

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