Fe-induced enhancement of antiferromagnetic spin correlations in Mn2−xFexBO4
| Autor: | E.I. Pogoreltsev, Yu. V. Knyazev, M.S. Platunov, Mikhail V. Gorev, N. V. Kazak, Galina M. Zeer, Sergey M. Zharkov, Oleg A. Bayukov, Sergey Ovchinnikov, S. Yu. Gavrilkin, E.M. Moshkina |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Spin glass Magnetic moment Condensed matter physics media_common.quotation_subject Frustration 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Magnetic susceptibility Electronic Optical and Magnetic Materials Magnetization 0103 physical sciences Mössbauer spectroscopy Antiferromagnetism Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology Ground state media_common |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 452:90-99 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2017.12.037 |
| Popis: | Fe substitution effect on the magnetic behavior of Mn2−xFexBO4 (x = 0.3, 0.5, 0.7) warwickites has been investigated combining Mossbauer spectroscopy, dc magnetization, ac magnetic susceptibility, and heat capacity measurements. The Fe3+ ions distribution over two crystallographic nonequivalent sites is studied. The Fe introduction breaks a long-range antiferromagnetic order and leads to onset of spin-glass ground state. The antiferromagnetic short-range-order spin correlations persist up to temperatures well above TSG reflecting in increasing deviations from the Curie-Weiss law, the reduced effective magnetic moment and “missing” entropy. The results are interpreted in the terms of the progressive increase of the frustration effect and the formation of spin-correlated regions. |
| Databáze: | OpenAIRE |
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