SS-MRAM is a superlattice based magnetoresistive RAM, in which the barrier is made of superlattice to replace crystal MgO (001). The superlattice is a high spin polarization artificial metamaterial, which is composed of stable insulatormetal materials. Compared with the current STT-MRAM, SS-MRAM has the advantages of low readingwriting power consumption, fast readingwriting speed, s