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СРАВНИТЕЛЬНЫЕ ВЫСОКОПОЛЕВЫЕ ИССЛЕДОВАНИЯ СОЕДИНЕНИЙ (SM,HO)2FE17 И HO2FE17, ИХ ГИДРИДОВ И НИТРИДОВтезисы доклада
- Авторы: Терешина И.С., Веселова С.В., Вербецкий В.Н., Иванов Л.А., Пауков М.А., Горбунов Д.И., Савченко А.Г.
- Сборник: Тезисы XXII международной конференции по постоянным магнитам / сост. А. С. Лилеев. ― М. : Издательский дом «Графит», 2019. ― 176 с
- Тезисы
- Год издания: 2019
- Первая страница: 70
- Последняя страница: 71
- Номер статьи: A‒02‒03
- Аннотация: In 3d-4f intermetallics, the coupling between the rare earth (R) and Fe moments is either parallel for the first half (Ce‒Eu) or antiparallel for the second half (Gd‒Tm) of the rare earth series. At sufficiently high magnetic fields, the antiparallel coupling of magnetic moments can be destroyed, and the field-induced magnetic transitions along the easy magnetization axis provide information on the strength of the intersublattice coupling. For the R‒Fe intermetallics with a high Fe content, the importance of this fundamental problem is revealed in the number of works dedicated to the study of R2Fe17 compounds. The present work is aimed at investigation of the high-field magnetization process in the hydrogen- and nitrogen- charged Sm1.2Ho0.8Fe17 and Ho2Fe17 at various temperatures (4.2, 40, 80, 120 K) in order to clarify the effect of the interstitial H and N on the strength of the intersublattice molecular field (i.e. the field created by the Fe sublattice and acting on the R sublattice). We found that the substitution of a part of Ho atoms by Sm leads to the considerable shift of the transition field toward the higher fields for the parent Sm1.2Ho0.8Fe17 and its hydride. However, the transition in Sm1.2Ho0.8Fe17N2.4 nitride preserves its location with respect to field. We further investigated properties of several powder Sm1.2Ho0.8Fe17N2.4 nitrides which had various dispersity of the particles as a result of used different times of milling the compounds in the ball mill. We discovered that dispersity of particles influences the field-induced transition, and as a result, the R‒Fe exchange interaction in the R2Fe17-type of nitrides ― the compounds attractive for the use as permanent magnets.
- Добавил в систему: Веселова Светлана Владимировна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | сборник тезисов конференции по постоянным магнитам | elibrary_41453657_79879586.pdf | 6,6 МБ | 5 ноября 2022 [sv_veselova] |