Ab-initio modeling of magnetic exchange stiffness of complex materials

In this work, we discuss the method of magnetic exchange stiffness calculation. The method is based on ab-initio electronic structure calculation by use of parallel and antiparallel magnetic domain configurations. It allows to avoid the atomic magnetic exchange interaction calculations that are more complicated, less accurate, and often not easily applicable in complex materials. The application of the developed approach was experimentally verified in the case of most common MRAM materials.