Abstract
A detailed study of the electrical and magnetic properties of polycrystalline La0.52Gd0.15Ca0.33MnO3 has been carried out. This perovskite-type compound should be a canted ferromagnetic metal at low temperatures. The magnetization and conductivity show considerable thermal hysteresis, indicating a first-order canted ferromagnetic state-to-paramagnetic state transition. Application of a magnetic field H = 1.5 T leads to a metamagnetic transition from canted ferromagnetic ordering to ferromagnetic ordering up to 95 K, and magnetoresistance (Delta rho/rho(0)) larger than 90% over a temperature range similar to 30 K has been observed. [S0163-1829(97)00942-9].