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- W2130182479 abstract "A systematic study of the particle size effect on electrical, magnetic and colossal magnetoresistance of nanocrystalline Nd/sub 0.7/Sr/sub 0.3/MnO/sub 3/ sample was carried out. Samples were synthesised by citrate auto-ignition method. The resulting precursors were then calcined for 3 h at 700, 800 and 900/spl deg/C to get different particle sizes. To measure electrical resistivity and magnetoresistance, pellets were sintered and quenched to room temperature for 10 minutes at respective calcination temperature. X-ray diffraction patterns, Debye-Scherrer's formula, and transmission electron microscopy were used to approximate crystallite sizes. AC magnetic susceptibility shows a broad transition, due to particle size reduction, with ferromagnetic transition temperature at 130 K. Upon cooling, the electrical resistivity shows an insulator to metal transition at /spl sim/140 K. It is also observed that spin moment values increase with increasing particle size." @default.
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- W2130182479 date "2005-01-01" @default.
- W2130182479 modified "2023-10-18" @default.
- W2130182479 title "Effect of particle size on electrical and magnetotransport properties of manganite nanoparticles" @default.
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- W2130182479 doi "https://doi.org/10.1109/intmag.2005.1464090" @default.
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