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- W2007479153 abstract "The structure of Nd1-xPbxMnO3 crystal for x=0.25 is determined at room temperature by single-crystal X-ray diffraction. The structural refinement reveals that the crystal is tetragonal with space group P4/mmm, Z=4 and R of 8.3%. The lattice parameters are a=7.7652(1) Å, c=3.884(1) Å and α=β=γ=90∘. The structural analysis is then extended to x=0.38. It is noticed that substitution of Pb at the Nd site results in structural phase change from tetragonal (x=0.25) to cubic (x=0.38). These changes are attributed to the progressive removal of inter-octahedral tilting and minimization of the octahedral distortion leading to a higher symmetry as doping concentration increases. While the unit cell volume of tetragonal structure (P4/mmm) is comparable to that of parent NdMnO3 (Pnma), the volume of cubic unit cell (Pm3¯m) is doubled. Electron diffraction patterns support these results and rule out the possibility of twinning. Changes in transport properties as a function of temperature at different doping levels are in accordance with the observed structural changes. It is observed that Tθ and TMI increase with x." @default.
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- W2007479153 date "2005-01-01" @default.
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- W2007479153 title "Influence of dopant concentration on the structure and physical properties of NdPbMnO single crystals" @default.
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- W2007479153 doi "https://doi.org/10.1016/j.jssc.2004.07.016" @default.
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