Local environment effects on hyperfine interactions in disordered transition metal systems
Supervisor: Marcus Ekholm
Level: adaptable to Bachelor or Master level
Prerequisites: Physics of condensed matter I (TFFY70) Quantum Mechanics (TFFY54)
In solid matter, atoms of the same kind but with unlike neighbours may exhibit very different properties . This effect is frequently seen experimentally, e.g., in spectroscopic measurements . A theoretical understanding of the relation between the microscopic local environment and observable properties is therefore of prime importance in modern materials science.
! In transition metals such as Fe and Ni, the electronic charge density at the nucleus is spin polarised, causing a local magnetic field interacting with the nuclear magnetic moment. In turn, this gives rise to a hyperfine Zeeman splitting of the nuclear energy levels, which is readily measured with Mössbauer spectroscopy. This is a powerful tool to extract information on the local environment in multicomponent systems .
! Within this project we will use state-of-the-art computational tools to investigate the relation between the local environment and the local magnetic fields giving rise to hyperfine splittings in disordered FeNi-alloys. We will model the alloy system by including a large number of atoms in our simulations. This will allow us to study the distribution of the fields in the disordered alloy and to extract statistical data.
As a student, you will learn how to use modern ab-initio computational tools employed in academia as well as industry, such as the Vienna ab-inito simulation package  and the Wien2k code . You will also gain experience in handling large-scale supercomputer simulations.
Responsible for this page: Fei Wang
Last updated: 12/30/13