对射频共溅射法制备的ＦｅＡｌ２Ｏ３颗粒膜的隧道巨磁电阻效应进行了研究．当Ｆｅ体积百分比为４５％时，样品的室温磁电阻的变化率（ＭＲ）在１Ｔ的平行膜面的磁场下可达４４％．磁测量表明在室温时样品呈超顺磁态．另外，从ＭＲ随温度的变化关系曲线可以看出，当温度低于５０Ｋ时，ＭＲ随着温度的下降而显著增加，ＭＲ在２０Ｋ时达到１４９％，４２Ｋ时可达２６％，大大超过理论的预期值，这可能与低温下由库仑抑制效应引起的自旋相关隧穿的高阶效应有关． The tunneling magnetoresistance effect of FeAl2O3 particles prepared by RF co-sputtering was studied. When the volume fraction of Fe is 45%, the rate of change (MR) of the room temperature magnetoresistance of the sample can reach 44% under the magnetic field of 1T parallel film surface. Magnetic measurements show that the sample is superparamagnetic at room temperature. In addition, from the relationship curve of MR with temperature, it can be seen that when the temperature is lower than 50K, MR increases with the decrease of temperature, MR reaches 149% at 20K and 26% at 42K, Much higher than the theoretical expected value, which may be related to the high-order effect of spin-dependent tunneling caused by Coulomb repression effect at low temperature.