Research Fellows Directory
Dr Gino Hrkac
University of Exeter
My main research area is computational and theoretical magnetism, and especially the development of a numerical model to investigate and predict the behaviour of magnetic spin valve systems and the effect of interface effects on an atomistic scale in nano- and micro-scale materials.
In particular I am working on the description of magnetic spin electronic devices ranging from the computation of the local spin current density and magnetization dynamics with a sub-nm resolution in micron size devices (MRAM, HDs) to high performance magnets used in hybrid cars.
A prominent example for my work is the theoretical explanation of spin current induced magnetization dynamics that explained the low frequency oscillations found in point contact devices (magnetic vortex oscillators) and magnetic hybrid structures that exhibit new types of dynamic and magnetic properties (mutual domain imprinting) that can be exploited as high power radio frequency oscillators, memory devices and cryptography.
My latest research includes ab initio simulations of atomic structures and solid-state molecular dynamics for the simulation of amorphous and crystalline grain boundaries in NdFeB magnets within the framework of an industrial European-Japanese consortium.
Besides the mathematical modelling of such devices an efficient and reliable solver for applied micromagnetics was developed, which is essential for market-ready product analysis and quality control. This knowledge was incorporated into a design software for future spin- electronic/magneto-electronic devices and currently used to design a new type of heat assisted magnetic recording media, currently explored in a joint UK-US industry collaboration.
Interests and expertise (Subject groups)