Quantitative Modeling of Magnetic Materials at the Atomic Scale

Explore the world of quantitative modelling of magnetic materials at the atomic scale in this 25-minute seminar by Dr. Joseph Barker from the University of Leeds. Delve into the intricacies of Atomistic Spin Dynamics (ASD) and its role in understanding spintronics experiments. Learn about the implementation of a quantum thermostat to address classical approximation limitations, enabling accurate thermodynamic property calculations across a wide temperature range. Discover how state-of-the-art first principles calculations are used to parameterize multiscale models that closely align with experimental results. The seminar covers various topics, including different approaches for different scales, atomic 'spins', the Langevin thermostat, multiscale modelling, quantum statistics in ASD, semi-quantum spin dynamics, and validation for simple ferromagnets. Explore the S-dependence of Curie temperature, non-local spin transport, and the properties of Yttrium Iron Garnet. Gain insights into new YIG exchange parameters, ab initio exchange parameters, magnon specific heat capacity, and magnon transport properties. The seminar concludes with a discussion on magnon spin conductivity and the Kubo formula, providing a comprehensive overview of this fascinating field of study.

Intro
Different approaches for different scales
Atomic 'spins'
The Langevin thermostat
Multiscale modelling
Atomistic Spin Dynamics
Quantum statistics in ASD
Semi-Quantum Spin Dynamics
Validation for a simple ferromagnet
S-dependence of Curie temperature
Non-local spin transport
Yttrium Iron Garnet
New YIG Exchange Parameters
Ab initio exchange parameters
Comparing parameters
Magnon specific heat capacity
Magnon transport properties
Magnon spin conductivity
Kubo formula
Summary
Acknowledgements