Magnetic film, multilayer magnetic film, method and mechanism of magnetization inversion of magnetic film, and magnetic random access memory

摘要

A magnetic random access memory capable of writing information with a small write current is provided. A magnetic film or a multilayer magnetic film of the present invention has a part where the magnetization inversion is relatively easier than in the other parts. A magnetization inversion mechanism of the magnetic film of the invention has an application protrusion for applying a stronger magnetic field to a part of the magnetic film than to the other parts thereof. The magnetic random access memory of the invention includes a magnetoresistive film having the multilayer magnetic film as a memory element or the magnetization inversion mechanism as a writing unit.