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- W2022302145 abstract "The growth of R1−x PbxMnO3 (R=La, Nd, [La,Nd]) single crystals by PbO/PbF2 flux is described with optimized growth conditions. The structure of Nd1−xPbxMnO3 changes from orthorhombic (x=0, Pnma) to tetragonal (x=0.25, P4/mmm) to cubic (x=0.38, Pm3¯m) as x increases. These changes are attributed to the progressive removal of inter-octahedral tilting and minimization of octahedral distortion leading to a higher symmetry as doping concentration increases. The TC of this system increases from 110 to 192 K for Pb concentration varying from x=0.15 to 0.42. The TMI also follows a similar trend. It is observed that 〈rA〉 and σ2 are the controlling parameters which influence the transport and magnetic properties of La0.7−yNdyPb0.3MnO3. The presence of spin wave excitations are observed prominently in La0.7Pb0.3MnO3 at low-temperature which is not so in case of Nd-based compounds. The total magnetic moments of all the Nd-based systems at low-temperature are influenced by Nd. The low-temperature specific heat data of La0.7−yNdyPb0.3 MnO3 is analyzed and contributions of different mechanisms are discussed. It is noticed that the Schottky anomaly is present in specific heat at low-temperature only in Nd-based compounds." @default.
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- W2022302145 date "2005-02-01" @default.
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- W2022302145 title "Growth and characteristics of lead-substituted rare earth manganites" @default.
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- W2022302145 doi "https://doi.org/10.1016/j.jcrysgro.2004.11.284" @default.
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