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- W2087101936 abstract "In this paper we present transport, magnetic and electron paramagnetic resonance (EPR) studies of electron doped manganites $Nd_xCa_{1-x}MnO_3(x = 0.2, 0.3)$ with a view to compare and contrast their properties with those of thehole doped $Nd_{0.5}Ca_{0.5}MnO_3$ and other manganites. The samples were prepared by the solid-state reaction method and the composition was verified using X-ray and EDAX measurements. Magnetization measurements on the x = 0.2 sample (NCMO 0.2) show a peak at 155 K accompanied by a sharp increase in the resistivity. In the case of x = 0.3 sample (NCMO 0.3) a peak in the magnetization along with an increase in the resistivity is observed at 220 K. From a comparison of the EPR results in the two compounds, we conclude that the transition in NCMO 0.2 is an antiferromagnetic transition which is likely to be a charge ordering transition as well and that in NCMO 0.3 is only a charge ordering transition at which long-range magnetic order is not established. We infer that in this compound the long-range antiferromagnetic order sets in at a much lower temperature below which the EPR signal disappears due to the opening of an antiferromagnetic gap." @default.
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- W2087101936 date "2004-06-01" @default.
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- W2087101936 title "Charge ordering and antiferromagnetic transitions in NdxCa1−xMnO3(x=0.2,0.3) manganites" @default.
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- W2087101936 doi "https://doi.org/10.1016/j.physb.2004.02.005" @default.
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