Anisotropy in magnetic thin films--from ab-initio calculation to model systems

Rövid cím: 
Anisotropy in magnetic thin films
2016. 10. 28. 10:15
BME Fizikai Intézet, Elméleti Fizika Tanszék, Budafoki út 8. F-épület, III lépcsőház, szemináriumi szoba
László Udvardi (BUTE Dept. Theor. Phys.)

Anisotropy plays and important role in determining the magnetic structure of thin films. By the Mermin-Wagner theorem, long range order is impossible in its absence in low-dimensional systems. The competition of the contributions of different types of anisotropy gives rise to a wealth of magnetic phases from ferromagnetism to skyrmions. In the talk I will discuss the temperature dependence of isosotropy in detail. I will demonstrate the use of metadynamics, a new simulation technique, to explore the free energy of simple magnetic systems.