Atomistic study of Positive Exchange Bias in Hard/Soft ferromagnetic bilayer nanosystem

We present calculations for the Exchange spring nano-bilayer with intermixing of high and low anisotropic moments at the interface, where we study the unusual phenomenon of positive exchange bias. The results are well reproducible at different simulation temperatures. However, the amount of shift as well as the width of M-H loop is greatly influenced by the temperature itself. We illustrate interface roughness as an important cause for the shift of Hysteresis loop in Ferromagnetic Hard/Soft nano bilayer systems.