Cu/Fe准周期超晶格的磁性

Magnetism of Cu/Fe Quasi Periodic Super Lattice

通过穆斯堡尔谱、振动样品磁强计和提拉样品磁强计对Ｃｕ／Ｆｅ一维准周期金属超晶格（ＯＱＰＭＳＬ）样品的磁性进行了研究。穆斯堡尔谱实验结果表明，居里点高于室温的ＯＱＰＭＳＬ样品在室温下呈现顺磁性而在低温（７７Ｋ）下呈现铁磁性，出现所谓超顺磁现象。进一步分析表明，超顺磁性的存在使得造成磁偶极分裂的磁场数值减小、超精细场减弱。其它实验数据证实了穆斯堡尔谱的分析结果。

The magnetism of the Cu/Fe quasi periodic super lattice has been studied by using Moessbauer spectrum, vibrating sample magnetometer and Czochralski magnetometer. The results obtained show that the Curie point of the Cu/Fe quasi periodic super lattice is higher than room temperature. The Cu/Fe quasi periodic super lattice sample with a Curie point higher than 300 K exhibits super paramagnetism at room temperature. The majority of iron atoms in the Cu/Fe quasi periodic super lattice sample is paramagnetic at room temperature, whereas the minority are ferromagnetic, so the hyperfine field is weakened.