Magnetic short-range order in Fe and Ni above the Curie temperature
| Autor: | B. I. Reser, G. V. Paradezhenko, Nikolai B. Melnikov |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Spatial correlation Range (particle radiation) Materials science Condensed matter physics 02 engineering and technology Neutron scattering 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials 0103 physical sciences Short range order Curie temperature 0210 nano-technology Spin (physics) |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 473:296-300 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2018.10.051 |
| Popis: | We study magnetic short-range order in Fe and Ni above the Curie temperature using the nonlocal dynamic spin-fluctuation theory with self-consistent calculation of the self-energy. We calculate the spatial correlation function of Fe and Ni at nearest neighbours, next-nearest neighbours, etc., in a wide range of temperatures. Our results are in agreement with neutron scattering experiments but give a larger short-range order compared to classical spin models. We show that the spatial spin correlator decreases ten times at distances of about 6 A in Fe and 8 A in Ni at T / T C = 1.1 and short-range order remains well above the Curie point. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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