Pressure-induced insulator-metal transition in a bilayer manganite: Pressure control of orbital stability
نویسندگان
چکیده
Pressure effects on transport as well as structural properties have been investigated for a bilayer manganite, La222xSr112xMn2O7 (x50.48), near the phase boundary between the ferromagnetic metallic and the A-type antiferromagnetic states. An insulator-metal ~IM! transition is found to be induced by applying pressure of ;0.7 GPa. On the basis of the synchrotron radiation x-ray structural analysis under high pressures, we have ascribed the IM transition to the variation of the stability of the eg orbitals.
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