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研究了熔体快淬法所得Ｌａ０．８５Ｓｒ０．１５Ｍｎ合金经过氧化处理后的组织变化和磁阻特性，结果表明：（１）这一合金在大气中加热氧化处理，在较低温度下可得到具有钙钛矿结构的Ｌａ０．８５Ｓｒ０．１５ＭｎＯｙ。（２）经过１０７３Ｋ以上温度的热处理后，所得材料的磁
The microstructures and magnetoresistance characteristics of La0.85Sr0.15Mn alloy obtained by the melt quenching method were investigated. The results show that: (1) The alloy is heated and oxidized in the atmosphere at low temperature, Perovskite structure of La0.85Sr0.15MnOy. (2) After the heat treatment at a temperature of 1073K or above, the resulting material is magnetically