PRESSURE-DEPENDENCE OF RESISTIVITY AND MAGNETORESISTIVITY IN LAYERED MANGANATES (LA,SR)(3)MN2O7

Preliminary results on the pressure dependence of resistivity and magn etoresistivity in layered manganates La2-2xST1+2xMn2O7 (x = 0.3, 0.4, 0.5) are reported. Layered manganates show remarkable differences in t heir electron transport behavior under pressure due to the inherent st ructural as well as electronic and magnetic anisotropy compared to the isotropic perovskite counterparts. The pressure-induced effects and c oupled magnetic field and pressure effects bring forth subtle features which enable us to distinguish the nature of electronic transitions i n these layered manganates.