ABSTRACT
PEROVSKITE compounds [La[1-x] Sm[x]] 0.7 Ca[0.3] MnO[3] ] = x < 0.14 were prepared using the double sintering ceramic technique. The measurement of the magnetic susceptibility at different temperatures as a function of the magnetic field intensity showed the change of the state from completely ordered to completely disordered state at T[c] which shifts to lower value by increasing Sm content. The tolerance factor decreases with increasing Sm concentration. Resistivity measurements indicate the disappearance of the related peaks with increasing Sm content. The large increase in the resistivity below 530 K is related to the spin transition of Mn[3+] ions from high to low state
Subject(s)
/chemistry , MagneticsABSTRACT
The complexes of Thiosemicarbazone 2-Hydroxy-1-Naphthaldehyde with Cu, Pd, and Ru transition metals were prepared. The prepared complexes were characterized by, elemental analyses, IR, H NMR, electronic spectra, thermogravimetric analyses, TGA and magnetic moment. The antimicrobial activity of all the prepared compounds against gram-positive, gram -negative and fungi was studied. From these studies, it has been obtained that the ligand is obtained to the metal through O, N and S. But to Palladium in [Pd [H[2]L[2]] C[12] only through N and O