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对钙钛矿结构锰酸盐巨磁电阻材料进行了阴离子掺杂的研究．Ｘ 射线衍射结果表明，Ｌａ２／３Ｃａ１／３Ｍ（Ｏ１－ ｘＦｘ）３化合物的空间群为Ｐｂｎｍ ，Ｚ＝４，Ｆ－ 离子占据８ｄ 位置， 随着ＣａＦ２ 掺入量的增加，晶格常数和晶胞体积呈递减趋势．ＣａＦ２ 的掺入使居里温度Ｔｃ 升高．分别在０ 磁场和Ｈ＝ ３９７７ｋＡ／ｍ 的外加磁场下进行阻温曲线的测量，各试样巨磁电阻比率ΔＲ／Ｒ０的峰值均在６７％ 以上，掺３ ％ （物质的量百分数）ＣａＦ２ 时ΔＲ／Ｒ０ 最大， 峰值达到７４％ ．
Anion doping of perovskite manganites giant magnetoresistance material was studied. X-ray diffraction results show that the space group of La2 / 3Ca1 / 3M (O1-xFx) 3 compounds is Pbnm, Z = 4 and F- ions occupy the 8d position. With the increase of CaF2 incorporation, the lattice constant and unit cell Volume showed a decreasing trend. The incorporation of CaF2 increases the Curie temperature Tc. The temperature-dependent curves were measured under the applied magnetic field of 0 and H = 3977kA / m respectively. The peak values of the giant magnetoresistance (ER) ratio were all over 67% and 3% (mass fraction) of CaF2 ΔR / R0 maximum, the peak reached 74%.