151Eu Mِssbauer studies on La0.46Eu0.21Ca0.33MnO3 CMR system

La0.46Eu0.21Ca0.33MnO3 CMR system was prepared through standard solid state reaction method and characterized using XRD, electrical and magnetic transport measurements to understand the nature of metal-insulator and magnetic transitions in the material. 151Eu Mössbauer spectroscopic studies in the temperature range of 18–300 K were carried out in transmission geometry using 151Sm source. A narrow room temperature Mössbauer line with the isomer shift of 0.5 mm/s indicates that Eu replaces the La ion in the lattice with 3+ oxidation state. The temperature dependent evolution of magnetic nature is observed through drastic increase in the width of the spectrum around magnetic transition temperature. Non-Debye variation of Lamb–Mössbauer factor indicates the possible local structural variation around the phase transition boundaries.