Most MRAMs that are now being developed write data by applying the magnetic field generated by a current running through a wire near a tunneling magnetoresistive element to change the magnetization.
第一代MRAM的数据写入方式主要是向导线中通电使其周围产生磁场，从而改变邻近的存储单元的磁化程度。
2
Cobalt is a naturally magneticelement.
钴是一种天然磁性元素。
3
On this basis, as the permeability of permanent magnetism material is non-linear, two gear wheel's magnetic field is simulated with finite element software, and analysis of the result is carried on.