The perovskite manganites La_(1-x)A_xMnO_3 (A: Sr, Ca, Ba, Pb) have been attracted great attention and investigated deeply due to their colossal magnetoresistance (CMR) effect in recent 10 years or more.

• 钙钛矿结构的锰氧化物La_(1-x)A_xMnO_3(A:Sr、Ca、Ba、Pb等),由于其超巨磁电阻(Colossal Magnetoresistance,CMR)性质成为近年来研究的热点。