Abstract

Nanocrystalline composites in Ag(3(2+x))GdxTi(4-x)O(11+delta) (0 = X = 1.0) (S1-S5: x= 0, 0.25, 0.5, 0.75, 1.0) system were prepared by sol-gel method via nitrate-citrate route. The powder Xray diffraction studies shows orthorhombic unit cell with space group P-21212 in the samples. The average crystallite sizes are found to be in the range 22-84, 58-86, 67-77, 37-70 and 48-77 nm in S1-S5, respectively. Electron paramagnetic resonance lineshapes observed at 300, 77 and 8 K show the values of g matrices -2.02. The scanning electron micrographs show globular surface microstructure. The magnetic susceptibility show fairly strong paramagnetic nature of the samples and the calculated exchange integrals similar to 10(13) Hz show fairly rapid exchange process.