Institute of Physics of Materials AS CR, v. v. i. > Projects > Theory of magnetic systems in electric and electromagnetic fields

---

Theory of magnetic systems in electric and electromagnetic fields

Anotace

Progress in information and imaging technologies requires understanding microscopic processes which control reaction of magnetic materials to external fields. We will develop a formalism for describing magnetic materials in electric and electromagnetic fields and apply it to technologically promising phenomena and systems. Our approach is based on quantum mechanical calculations of electronic states; it utilizes the linear response theory for weak fields and nonequilibrium Green's functions for strong and time-dependent fields. A multi-perspective view is promoted by tackling more problems via different methods. The emphasis is on a unified relativistic description of transport properties and exchange interactions, on manipulation of the magnetic properties of thin films by an applied voltage, and on ultrafast magnetization dynamics induced by time-dependent laser pulses. Concerning the materials, we will focus on layered systems, on substitutionally disordered alloys and on noncentrosymmetric systems supporting the emergence of complex magnetic structures such as skyrmions.