通过掺CaF2制得了Nd0.67（Sr,Ca）0.33Mn（O，F）3（NSMO）磁电阻材料，并对它们作了结构分析和磁性能测量．X射线衍射结果表明，NSMO化合物保持Nd0.67Sr0.33MnO3的钙钛矿结构，空间群为Pbnm，Z＝4，F-离子占据8d位置；随着CaF2掺入量的增加，晶格常数减小，居里温度降低，而磁电阻性质呈明显的递增趋势·当掺入量为20mol％时，△R／R(0)的峰值达到99．7％。
Compounds of Nd0.67(Sr,Ca)0.33Mn(O,F)3 (NSMO) with colossal magnetoresistance (CMR)were prepared with CaF2 as dopant. X-ray diffraction with Rietveld analysis showed that NSMO compounds were of perovskite structures, with space groups of Pbnm, Z=4, and F- occupying 8d positions. As more amount of CaF2 were used, the lattice parameters and To of NSMO declined.The magnetoresistance (-△R/R) increased to a maximum of 99.7% when 20mol% CaF2 was doped.
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