Search

Sm content effects on structure and magnetic characteristics of nanocomposite magnets were studied.

The effects of Fe doping on the magnetic properties, conductivity and magnetoresistance of La0.7Sr0.3Mn(sub 1-y)FeyO3, with y from zero to 0.18 and La(sub 1-x)SrxMn0.88FeO.12O3, with x from 0.1 to 0.50, have been studied. Results indicates the existence of a peak in the thermal dependence of the resistivity when T(sub Pl) is lower than T(sub C) for increasing values of y in La0.7Sr0.3Mn(sub 1-y)FeO3. The La(sub 1-x)SrxMn0.88Fe0.12O3 oxides are insulators when x < 0.2 and when x > 0.5 at 78 K.