Тип публикации: статья из журнала
Год издания: 2018
Идентификатор DOI: 10.1016/j.jmmm.2017.12.037
Ключевые слова: Magnetic frustrations, REHAC, Spin-glass, SRO spin correlations
Аннотация: Fe substitution effect on the magnetic behavior of Mn2−xFexBO4 (x = 0.3, 0.5, 0.7) warwickites has been investigated combining Mössbauer spectroscopy, dc magnetization, ac magnetic susceptibility, and heat capacity measurements. The Fe3+ ions distribution over two crystallographic nonequivalent sites is studied. The Fe introductionПоказать полностьюbreaks 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. © 2017 Elsevier B.V.
Журнал: Journal of Magnetism and Magnetic Materials
Выпуск журнала: Vol. 452
Номера страниц: 90-99
ISSN журнала: 03048853
Издатель: Elsevier B.V.