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The complex lanthanide doping of electron manganites results in enhancementof various phase separation effects in physical properties of these compounds.Selecting Ca0.8Sm0.16Nd0.04MnO3 as a model case we show that the first orderstructural phase transition from paramagnetic semi-metallic phase intoanti-ferromagnetic semi-metallic phase at TS ~ 158 +- 4 K is marked by anabrupt decrease in magnetization, a step like anomaly DL/L = 10-4 in thermalexpansion and large latent heat DQ = 610 J/mol. In a certain temperature rangebelow TS, the high field magnetization exhibits hysteretic metamagneticbehavior due to field-induced first order transformation. ac-susceptibility,magnetization and resistivity data suggest rather a non-uniform state inCa0.8Sm0.16Nd0.04MnO3 at low temperatures. The metal - insulator transitionoccurs at TMI ~112 +- 3 K, accompanied by a step-like increase inmagnetization. These features could be ascribed to "sponging" of electrons fromneighboring anti-ferromagnetic matrix by clusters undergoing the ferromagneticordering.Comment: submitted to J.Phys. Cond. Matte

Enhancement of the phase separation aspect in the electron doped manganite Ca0.8Sm0.16Nd0.04MnO3

Enhancement of the phase separation aspect in the electron doped manganite Ca_0.8Sm_0.16Nd_0.04MnO₃