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The pressure dependence of the resistivity and structure ofLa0.60Y0.07Ca0.33MnO3 has been explored in the pressure range from 1 atm to ~7GPa. The metal to insulator transition temperature (TMI) was found to reach amaximum and the resistivity achieves a minimum at ~3.8 GPa. Beyond thispressure, TMI is reduced with a concomitant increase in the resistivity.Structural measurements at room temperature show that at low pressure (below 2GPa) the Mn-O bond lengths are compressed. Between ~2 and ~4 GPa, a pressureinduced enhancement of the Jahn-Teller (JT) distortion occurs in parallel withan increase in Mn-O1-Mn bond angle to ~180 (degree). Above ~4 GPa, the Mn-O1-Mnbond angle is reduced while the JT distortion appears to remain unchanged. Theresistivity above TMI is well modeled by variable range hopping. The pressuredependence of the localization length follows the behavior of TMI.Comment: 26 pages, 6 figure

Effects of pressure on electron transport and atomic structure of manganites: Low to high pressure regimes