Pressure effects on charge, spin, and metal-insulator transitions in narrow bandwidth manganite Pr${}_{1-x}$Ca${}_x$MnO${}_3$

Abstract

Pressure effects on the charge and spin states and the relation between the ferromagnetic and metallic states were explored on the small bandwidth manganite Pr${}_{1-x}$Ca${}_x$MnO${}_3$ (x = 0.25, 0.3, 0.35). Under pressure, the charge ordering state is suppressed and a ferromagnetic metallic state is induced in all three samples. The metal-insulator transition temperature (T${}_{MI}$) increases with pressure below a critical point P*, above which T${}_{MI}$ decreases and the material becomes insulating as at the ambient pressure. The e${}_g$ electron bandwidth and/or band-filling mediate the pressure effects on the metal-insulator transition and the magnetic transition. In the small bandwidth and low doping concentration compound (x = 0.25), the T${}_{MI}$ and Curie temperature (T${}_C$) change with pressure in a reverse way and do not couple under pressure. In the x = 0.3 compound, the relation of T${}_{MI}$ and T${}_C$ shows a critical behavior: They are coupled in the range of $\sim$0.8-5 GPa and decoupled outside of this range. In the x = 0.35 compound, T${}_{MI}$ and T${}_C$ are coupled in the measured pressure range where a ferromagnetic state is present.

References in corpus (10)

• X-ray Resonant Scattering Studies of Orbital and Charge Ordering in Pr${}_{1-x}$Ca${}_x$MnO${}_3$
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• Non-linear conduction in charge-ordered Pr${}_{0.63}$ Ca${}_{0.37}$ MnO${}_3$ : Effect of magnetic fields
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• Effects of Pressure on Electron Transport and Local Structure of Manganites: Low to High Pressure Regime
• Transport and structural study of pressure-induced magnetic states in Nd0.55Sr0.45MnO3 and Nd0.5Sr0.5MnO3
• Raman Scattering in charge ordered Pr_{0.63}Ca_{0.37}MnO_{3} : Anomalous Temperature Dependence of Linewidth
• Pressure Induced Reentrant Electronic and Magnetic State in Pr0.7Ca0.3MnO3 Manganite

Cited by in corpus (6)

• Pressure induced magnetic phase separation in La${}_{0.75}$Ca${}_{0.25}$MnO${}_3$ manganite
• High-Pressure Phase Diagram in the Manganites: a Two-site Model Study
• Two insulating phases in compressed Pr1-xCaxMnO3 thin films
• High pressure Raman study of La${}_{1-x}$Ca${}_x$MnO${}_{3-\delta }$ manganites
• A phenomenological model for the pressure sensitivity of the Curie temperature in hole-doped manganites
• Dominant role of charge ordering on high harmonic generation in Pr_{0.6}Ca_{0.4}MnO_{3}