A. Seffar et al., GIANT MAGNETORESISTANCE IN CERAMIC PEROVSKITES LA-L-CA-MNO (L=Y,GD), Journal of magnetism and magnetic materials, 158, 1996, pp. 260-261
Giant negative magnetoresintance response has been observed in ferroma
gnetic La(1-x)A(x)MnO(3) (A = Ca2+) perovskites sintered ceramic mater
ials near room temperature, We have also observed that the magnetoresi
stance response of these materials increases, while the temperature at
which the maximum of the resistance appears decreases, by substitutin
g some amount of La by Y.