Simulated floating zone method

International Conference on Strongly Correlated Electron Systems 2016

Ozawa, Ryo^1 ; Kato, Yasuyuki^1 ; Motome, Yukitoshi^1

Department of Applied Physics, University of Tokyo, Tokyo

113-8656, Japan^1

关键词: Characteristic energy;    Defect and Impurities;    Domain formation;    Efficient simulation;    Floating zone method;    Itinerant magnets;    Magnetic vortices;    Thermal equilibrium state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/807/10/102005/pdf
DOI  :  10.1088/1742-6596/807/10/102005

来源: IOP

【 摘 要 】

This paper provides the simulated floating zone (SFZ) method that is an efficient simulation technique to obtain thermal equilibrium states, especially useful when domain formation prevents the system from reaching a spatially-uniform stable state. In the SFZ method, the system is heated up locally, and the heated region is steadily shifted, similar to the floating zone method for growing a single crystal with less lattice defect and impurity in experiments. We demonstrate that the SFZ method suppresses domain formation and accelerates the optimization of the state, taking an example of a magnetic vortex crystal state realized in itinerant magnets. We show that the efficiency is maximized when the local heating temperature is tuned to be comparable to the characteristic energy scale of the ordered state.