Monte Carlo modeling the phase diagram of magnets with the Dzyaloshinskii - Moriya interaction
| Autor: | Sergei M. Stishov, A. M. Belemuk |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Phase transition Condensed matter physics Strongly Correlated Electrons (cond-mat.str-el) Monte Carlo method Exchange interaction Spin system FOS: Physical sciences 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Condensed Matter - Strongly Correlated Electrons High pressure Magnet 0103 physical sciences Materials Chemistry Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology Constant (mathematics) Phase diagram |
| DOI: | 10.48550/arxiv.1705.07776 |
| Popis: | We use classical Monte Carlo calculations to model the high-pressure behavior of the phase transition in the helical magnets. We vary values of the exchange interaction constant J and the Dzyaloshinskii-Moriya interaction constant D , which is equivalent to changing spin-spin distances, as occurs in real systems under pressure. The system under study is self-similar at D / J = constant , and its properties are defined by the single variable J / T , where T is temperature. The existence of the first order phase transition critically depends on the ratio D / J . A variation of J strongly affects the phase transition temperature and width of the fluctuation region (the ”hump”) as follows from the system self-similarity. The high-pressure behavior of the spin system depends on the evolution of the interaction constants J and D on compression. Our calculations are relevant to the high pressure phase diagrams of helical magnets MnSi and Cu 2 OSeO 3 . |
| Databáze: | OpenAIRE |
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